revenge is ultimately hollow.
for a revenge story, it is decent. art is also good. it will take a while to get to the good parts, because you just KNOW he will success in his revenge anyway so the early parts of the game will feel like a drag. so you may as well just read up. spoilers ahead.
this is a story of a kid that has nothing and lives in the streets. then picked up by the kingdom as a child soldier to fight for the country. the country summoned demons to uno-reverse the war and the children used as vessel for the demons to live in (mostly inside his head). at the end of the mission, he was then backstabbed. his usefulness has ended.
or so it should have been. but thanks to the demons he survived, and years later comes back to the kingdom plotting a revenge. since he's an unwilling victim, he decides that the princess, who is also innocent, to be his unwilling victim. yes the king is on this child soldier plot and thus the daughter should be punished.
later it was revealed that the summoning isn't complete. so as part of the deal, the demons will help with his revenge and he will help with the completion of summoning.
gameplay: it's honestly a joke. you are basically torturing the princess to farm dark essences which will power up the demons. on your first playthough it's almost impossible to get the revenge completed endings. so anyway the endings
you have two heroines, the princess and the meddling cardinal. i find the cardinal route good. i teared up a bit. she got defeated a few times, the difference in power is obvious, then an ace in the hole showed itself only to be crushed later. and yet she got real big guts to put everything in faith even though she's powerless to the mc. although the deux ex machina fight scene was laughable. in the end he is with the cardinal but she had to remove herself from the church (hello, he's a criminal!) and now they're on an otherwise aimless journey while spreading good works. oh and the demons are staying with him and all of them reconciled and got a closure. of all the endings this is the best of them all imo.
the princess ending, you fully powered the demons and they took over the princess's body. revenge complete, except you're now hollow. at this point i was wondering why didn't the demoness stayed with him when he's the most vulnerable? oh that's because the writers had to do a reverse-uno and betray her instead. you know, for drama.
oh and I did mentioned that in your first playthrough it's almost impossible to get the revenge fulfilled endings? yes, you have to go to another run to farm enough essences to see the other ending. this time he didn't go all empty and hollow inside. the difference is one additional h-scene and then.... it's over. yeah. its that bullshit. kinda wish i didn't bother at all.