Don't forget to add your details to the about page.
Icons are boxes :P Common standards are 432x432, 256x256, 48x48, 32x32, 16x16
Clear textbox options would be nice.
https://mega.nz/file/mWAlCASA#S2PR8CFHv540su0bfqMtTp92pVgjgx3fXHRmwlFsiGA
As for game play
Entering the preferred character name does nothing... "Keisuke" just gives a small joke. Some players will be more interested if the girls use their name instead of a generic one. Generally the player's name is also stored in persistent for replay gallery use.
One option choices doesn't give much of a 'choice' does it? Not sure why devs do that as if the player is skipping they are probably horny and it just interrupts the flow when there isn't anything for the player to actually do.
Day graphics could use an outline or something... It's hard to read.
Girls are cute.