Shitty and Boring Porn Game Visual Novel:
You are Mario, the new transfer student in Mushroom High School. Your objetive in the game is to have sex win Peach's heart before the graduation party. Mario the Main Character will be able to befriend other people like Luigi the Loser, Bowser the Bully, Pikachu the Pet, Wario the Wacky, Birdo the Bisexual and Peter the Parker, the guest artist. Mario should be happy careful because other girls like Daisy or Rosalina will try to fuck him draw his attention, preventing him from fulfilling his naughty goals.
After beating the game a new mode will be unlocked, Girl Mode, where you can play as any of the girls you have completed her route in the normal game. In this mode your objetive is to enslave charm as many male students as possible to become the School Queen.
I like your visual novel idea. I really enjoyed the Peach part with Francis in Super Paper Mario.