Kouta Koikawa. The game's protagonist. A diligent college sophomore, Kouta has the insatiable libido of an inexperienced young man, which got even more intense when Chieri comes to his school. When Chieri discovers the source of his slipping grades and offers to ease his sexual tension, it's the gateway to a marvelous unknown world of love and sex! Age 19.
Kiyoka Yorii. Your classmate. She's an honor student from a wealthy family, gifted with good grades and athletic ability - on top of which she's got great looks and is nice to just about everybody. She's the idol of the school, but her hidden side has a tremendous competitive streak.... When she falls for you, who knows how far she'll go to win your affections away from Chieri? Age: 19.
Mamiko Kanai. A math professor who started work at your school the same time as Chieri. They've been friends since their college days, though unlike Chieri her bright personality and carefree attitude have won her plenty of welcome companionship. She enjoys her role as Chieri's mentor in the ways of the world, and her sexy looks make her quite popular among the students. Age: 26.
Chieri "Cherry" Hase. A rookie social studies professor at your school. While she's quite good looking, most men can't see past her glasses and plain fashion sense. Living the studious life until now she hasn't had much experience in the world, though she's heard a lot of stories from her best friend Mamiko... She's had a hard time getting her students to pay attention in class, so she's especially grateful for your devotion. Age: 26.
Yoda Shigeaki. Your foul-mouthed classmate and self-proclaimed best friend, he never hesitates to speak his mind or become the center of attention in class. Despite his perverted ways he seems to be interested in Kiyoka. Age: 19.