Popular student Amamiya Kaito leads an ordinary high school life until he agrees to help quiet classmate Inui Masataka with supplementary lessons. Inui, a fudanshi deeply immersed in BL fandom, has secretly regarded Kaito as his personal "oshi"—a favorite idol-like figure. When Inui's intense adoration spills into the open, Kaito finds himself bewildered by the fervent attention and struggles to understand whether Inui's fixation is fan worship or genuine romantic interest. As Kaito tentatively accepts being pushed and cherished, the two navigate a series of chaotic, heartwarming encounters that blur the line between admiration and love. Kaito's own hobby of handicrafts and his gradual confusion over his feelings add depth to their evolving relationship, set against a backdrop of school life and otaku culture. The narrative follows their clumsy, comedic journey toward mutual affection, ultimately asking whether a fudanshi's passionate support can transform into something deeper.