SKMJ-513 High-achieving college students only! Underclassmen girls and reliable seniors challenge baseball fist! 'There's no way I can get excited with someone like you, who's like a little sister.' Easy fun for prize money! But... facing the forbidden ac

This time, the target is male and female students attending prestigious universities! A younger female student and an older male student challenge each other to a baseball fist game! Since they say 'I don't see you as the opposite sex, we're just friends,' if they don't get excited, we'll give them prize money! ...But as expected, just seeing the cute junior's underwear makes him lean forward w naked and if he tries to see more, he gets a full erection! The penalty game is live sex! The two of them heat up while keeping it a secret from their other friends!