Alex, a freshman, arrives at university full of excitement for independence and new experiences. He is greeted by Alina, a dormitory guide who shows him to his room. An accidental encounter in the women’s shower leads to a spontaneous sexual affair, marking the beginning of his pattern of impulsive physical relationships. He later meets his roommate Mark, who encourages social exploration. Alex visits the library, where he meets librarian Ellie; their flirtation escalates during a swimming pool date, resulting in another intense sexual episode. Two months into the semester, Alex has abandoned his studies, trading academic ambition for a relentless pursuit of casual sex. He systematically seeks out and sleeps with Yumi, Ruri, Ayano, and Shinju, each encounter leaving him more emotionally detached. The narrative culminates in a state of profound emptiness, as Alex realises that no amount of physical gratification can fill the void inside him.

During the library visit, Alex can either pursue Ellie or withdraw. Choosing to pursue leads to a swimming pool date and a passionate affair, revealing his capacity for charm and his disregard for social norms. This route highlights his ability to seduce through romantic pretence, but ultimately reinforces his emotional detachment.

While studying with Yumi, Alex can be hesitant or bold. Boldness results in a heated encounter, yet Yumi displays genuine affection, expressing a desire for a recurring relationship. Alex cannot reciprocate, and the route ends with his realisation that he is incapable of sustained emotional involvement.