Finished the game, decided to write a timeline of events, recap, and story summary due to the complexity of the story if people want it. Feel free to correct or add things if I am mistaken.
This is a broad overview based on the events and notes as presented by the game.
Spoilers
Before the events of the game:
in the land of Sakuraba, youkai and samurai were in conflict as youkai would terrorize humans for their sexual essence, leading to samurai killing any youkai they found. However, a mysterious organism landed and began seeking out any lifeforms it could find. It consumed beasts, birds, fish, and both youkai and humans by turning them into monsters. Seeing the danger, both youkai and samurai banded together to defeat this threat known as the Mononoke from spreading its disease. Lead by the lord of Sakuraba, Onma Tadakatsu, with his samurai retainers including from the Tachibana and Sakura clan, as well as the the Three Great Youkai, Hanahiru, Kokotsuzumi, and Nurari. They managed to stop the Mononoke, but not defeat it, with many youkai and samurai losing their lives, including Sakura and Gufu's parents.
Afterwards, the lord Onma Tadakastsu eventually made a deal with the youkai for helping defeat the Mononoke, allowing for youkai to live and work in the region. However this did not mean all was well. The lord retrieved a piece of the surviving Mononoke, called the Mononoke leg, and began researching to either defeat it or find way to tap into the power without sucumbing to its disease. Hanahiru, Kirari's mom, despite knowing the dangers the Mononoke possessed grew to fear the samurai as their martial strength could easily hunt down and kill the rest of the youkai if they wanted to. Thus, Hanahiru began formulating a plan to weaken the samurai by feigning alignment with the Sakuraba lord Onma Tadakatsu and use the Mononoke themselves. While she would operate the brothel as a safe space for the youkai, she would try to gain access to the castle and steal the Mononoke research for herself.
During this time, both the Tachibana and Sakura clans continued with Sakura becoming head of her clan and Gufu his. Gufu would work to grow in power, taking care of both his sister, Tamago and Sakura who he trained her under his guidance. Had things continued, Gufu would have gained a promient position under lord Onma Tadakatsu retainers and even surplant the Tachibana family as the leading clan. However, he began having relations with Hanahiru as a courtsan, who he did not know was a yokai. When Gufu met with Hanahiru, he began having feelings for her and decided to make her his wife instead. However, Hanahiru, wanting to use Gufu to gain access of the castle decided it was better to kill him since he refused to not marry he. As she had no longer any uses for him. She drained his vitality, resulting in taking his manhood away instead. When Gufu awoke not dead however, he grew distraught over his lost due to having his heart broken as well as with his inability to sire any children to continue the Tachibana lineage. Thus the Tachibana fell into ruin, with Gufu disgraced and made to work as an assassin and his sister now a spy for the castle. Despite Hanahiru Treachery, she was allowed to live and open the yokai brothel, with Gufu placed as a double agent to report any suspicion.
Timeline 1:
As the timeline continued, the events played out as so. Sakura grows up and wanting to reestablish her family legacy, participate in the martial tournment set up by the lord who wants to use it as a way to find an heir. This is due to the fact that Tomo had been secretly poisoning him with a drug to make him unable to have children to prevent him from having his way with her. With no way to produce an heir, the Onma Tadakatsu needs someone to continue protecting Sakuraba for the return of the Mononoke. In the first match, Sakura duels with Enka who wants to prevent Sakura from become the lord's heir, knowing it would lead her down a dark path. Unbeknownst to Sakura, the penelty of defeat is death, which Enka is executed after Sakura leaves. Sakura's next duel is against Gufu, who after failing to despair after all these years decides to either win a chance to restore the Tachibana family or at least die as a true samurai. The battle between them results in Gufu's eyes being sliced and Sakura's arm being cut off. Before Sakura can make the final blow, Enka's body appears due to Hanahiru and Kirari interference. This results in Sakura becoming enraged and attacking the lord before being subdued. The reasoning appears to both in attempt to have Sakura kill the lord or have Sakura killed, thus preventing a heir. As well as possibly to spare Tokuro.
Seeing this display, the Onma Tadakatsu believes Sakura is fit to be his heir. The lord tells her of the situation, the Mononoke and the threat it places on the land and why only the strongest can be the future lord. Sakura, after hearing this agree to the cause but due to the lost of her friend begins falling into darkness. After the lord passes away and Sakura become the next lord, her first task was to defeat the Mononoke beast on the Osore pass. It was defeated, but with the lost of Tamago who perished during the attack. On the return home, they were attacked by Hanahiru who saw the opportunity to take the defeated Mononoke beast and raid the castle for the Mononoke leg. However, when Hanahiru got the leg, it began transforming her into a monster that devastated the castle. The newly formed beast began spreading the disease over Sakuraba, leading to it's near destruction. The aftermath was that Sakuraba became a wasteland cut off by the outside world with the youkai retreating and the townsfolk slowly becoming mad. Sakura herself slowly being corrupted by the disease which turned her into a mad lord.
It is in this world which Suzune is born. After losing her parents, she is saved by a blind Gufu and decided to take her in. After growing attached to her, Gufu plans on leaving with her, but Suzune is kidnapped by Sakura, as Suzune has an apparent immunity to the disease, meaning she could possible hold the key to a cure to surviving the Mononoke. However Gufu managed to track down and duels Sakura, only to be defeated not before killing Sakura. In the aftermath, the castle is destroyed, killing Suzune but her soul is saved by Nurari who been watching her and taken a great fondness to the point of adopting her. Feelings her dismay over losing her father figure and the future of sakuraba, Nurari uses her power to send Suzube back in time to fuffill her two wishes. To create a future where everyone lives happily, and to fufill the wish so Gufu can die as a samurai. This starts the beginning of the game were Suzune finds Gufu but is adopted as Sakura's disciple.
Timeline 2:
This timeline is where the beginning of the game takes place. It progress as normal, however with Suzune now with Sakura. the events play out similar up until the tournment where Sakura and Gufu duel, both mortally wounding each other. However, unlike timeline 1, Kirari is unable to disrupt the duel by dumping the body of Enka and causing Sakura to go beserk at the lord. Resulting in Sakura decapitacing Tokuro's head. This result causes a time loop to occur, as the wish for everyone to live happily can not happen. This brings Sakura and Suzune back to the beginning of the game in chapter 2 to try again.
Timeline 3:
With knowdelge of the future, the events of the timeline changes. Informing Enka of the event, causes her to not join the tournment, saving her from execution. Informing Tamago of the events causes her to drug Gufu from participating but Tamago decides to take his place for a chance at restoring the Tachibana family. Sakura defeats Tamago but refuses to kill her per the lord's order. Seeing this defiance, the lord challenges Sakura, resulting in her arm being cut off. She is about to be killed until Gufu intervenes and cuts his eyes out to appease the lord. This works, but Kirari joins in, sent their by her mother to try and kill Sakura to prevent her from becoming the heir, as well as wanting to avenge her sister that Sakura killed, the monster at the bottom of Saino River. The lord allows this, resulting in Kirari and Sakura battling with Sakura victory. Impressed by her determination and skill, the lord names her the winner. However, despite having saved everyone from dying, the second wish for Gufu to die as a samurai causes another timeloop to happen, sending Suzune, Sakura, Tamago, Enka, and Kirari to the past.
Timeline 4
With everyone having remembered the past experience, they realized that something is keeping them from moving on to the future. They plan on meeting the third great yokai, Kokotsuzumi, who can maniplate memories. After traveling up the mountain and meeting her, they uncover the Suzune memories of the original timeline and the destructions of Sakuraba. Realizing that fufilling both wishes is impossible, they plan of taking out the Mononoke research instead to prevent the destruction in the future from occuring in the first place. They plan on convincing Hanahiru to use her space manipulation ability to let them into the castle undetected, but are betrayed instead, revealing that the destruction of the Mononoke research would ruin her plans on defeating the samurai. Thus, Hanahiru sends Suzune, Sakura, and Tamago to a pocket dimension to kill them. Unbenonst to them, Gufu had been following them and was teleported with them and was able to help counter Hanahiru. She is defeated and the group are sent to the castle where they reunite with Enka and Kirari where they all make their way to the room where the Mononoke research is being done.
Timeline 4, Ending O
Before the group manages to destroys the research, Hanahiru was hiding in wait to take the Mononoke Leg to use for herself. However, the mononoke leg begins transforming her into the beast of Timeline 1 that destroyed Sakuraba. This time, with Sakura, Enka, Tamago, Kirari, and Suzune in the same proximity, they become trapped and battle the newly transformed Hanahiru. They try but are all defeated with the rest sacrificing themselves and letting Suzune escape before being consumed by monster Hanahiru. Suzune encounters Gufu whose been blinded by Hanahiru. She trys to get help but is knocked out by him who realizes that Sakabura is already doomed and that he needs to protect her for the sake of the lives who sacrificed themsleves for her. He takes the unconscious Suzune to escape before Sakuraba falls just like in timeline 1.
Timeline 4, Ending B
Before the group manages to destroys the research, Suzune takes the Mononoke Leg before Hanahiru can get it. But Hanahiru kidnaps Suzune with the leg and tries to escape with Sakura and Gufu in pursuit. However, lord Onma Tadakatsu catches Hanahiru first and kills her for stealing the Mononoke Leg. Gufu seeing his former love dead, fall silent as he grieves over the body. Onma Tadakatsu then draws his swords on Suzune plans on killing her as he realizes her connection to Nurari, which sends Sakura in a rage. With both Sakura wanting to protect Suzune and Tokuro in vengence for Hanahiru, they battle lord Onma. Both manage to kill him, but not before sustaining mortal wounds, Gufu having his eyes cut and Sakura arm cut off. Both die succumbing to their wounds but having saved Sakabura
Timeline 4, Ending S
Before the group manages to destroys the research, Suzune takes Gufu's piss jar and throws it at Hanahiru where she was hiding. This distraction allows for Suzune to escape with the Mononoke leg. She takes it to the lord Onma Tadakastu who she believes is theonly the strongest one possible to destory the leg and is willing to sacrifise herself to him. The lord does so, destroying the leg but spares Suzune who he is impressed by the girl's spirit. The group after realizing what had happen, rushes in after her, thinking they are about to fight but are instead are pardoned by the lord. Seeing the girl's will and determination, believe their actions to destroy the Mononoke Leg was a good decision, as such is willing to let them breaking into the castle go. The group begin to leave but Gufu prevents Sakura from leaving, filled with a frenzy of his desire to die now that Sakabura is saved and challenges her to a duel to the death. She obliges and they both battle each other, resulting in both being mortally wounded. Gufu eyes being cut and Sakura's arm sliced off. Both dying with their weapons damaged. Suzune, coming to the aid of her master appears with new weapons and filling Sakura's spirit, allowing her to defeat Gufu. Finally besting him, Sakura is the winner before both die. Miraculously both end up recovered, with their bodies restored by Nurari using her time powers. With both wishes having been completed, Suzume is taken by Nurari as the timeline becomes changed, resulting in everyone surviving and the destruction of Sakuraba being prevented but Suzume being erased from everyone's memory.
Timeline 4, Ending SS
Although the future was saved, Sakura begins feeling the empty pressence of Suzune who she can not remember. However, after following the trails left in the suggestion box by Suzune who is stuck in time in between, she is able to confront Nurari. Sakura determined to save her beloved disciple, battles Nurari and manage to retake Suzune into the world. Both Sakura and Suzune reunited, return home, to everyone where they continued to live as master and student with everyone. Years later, Suzune would become master of the Sakura and Tachibana styles become renowned. At the end of her life, her soul would be reunited with Nurari where they spend eternity with each other.
This timeline takes place years before the event of the Monsterous Horror Show game series and are interconnected.*