The game has a pretty decent story, and I liked the time travel / repeating element, as a big long game this could have been an amazing story but here it is okay too.
The characters are alright, I liked the MC, Shima and Kiriko, and Rui was okay too. Ayaka was just boring but looked good and Marina was just boring and looked boring too.
The sex scenes all have very good art but could be shorter too much meaningless slurp slurp texts.
The game is pretty linear most choices only changing if you cum inside or on someone, so don´t expect too many meaningfull choices.