Izumi Seita, a reserved and cynical high school student who is gay, finds himself developing feelings for his polar opposite, his best friend Shinoya Toichi. As Izumi prepares to depart for university, he seizes a fleeting opportunity to be intimate with Shinoya, an encounter that feels surreal and unforgettable. Despite the intensity of their connection, Izumi is determined not to jeopardize Shinoya's well-being and resolves to bury his emotions, a choice that plunges him into anguish. However, Shinoya is not willing to let Izumi walk away so easily, challenging his resolve and refusing to let their bond fade into the past.