The older twin, Ikurou, is a top-ranked academic achiever, while his younger counterpart, Akaya, struggles and falls below average. Although Ikurou has a superiority complex towards his brother, he feels uneasy under Akaya's scrutinizing gaze. This uneasiness traces back to a past encounter in which Akaya asked if he could touch Ikurou, leaving him feeling trapped. Whenever Ikurou reprimands Akaya, he simply shrugs it off by changing his lifestyle and vowing to outperform his brother academically. The competition between the two culminates in a bet, with a prize on the line.