Imouto no Mune ga Suki

The stifling heat of a summer afternoon clings to the empty classroom, where the only sounds are the distant chirping of cicadas and the nervous drumming of Nakaba Masaki's heart. Summoning every ounce of courage he possesses, he turns to his classmate, Yuzuki Tsubasa, and lays bare the feelings he has harbored for so long. With the silence of the deserted school pressing in around him, he fully expects the awkward pause that typically precedes a gentle refusal, steeling himself for the sting of rejection that seems all but certain. Yet the response that falls from Tsubasa's lips shatters every assumption he held. Instead of a polite dismissal or a flustered retreat, she presents him with an utterly bewildering condition for her acceptance: she will agree to date him, but only on the precarious terms that he simultaneously pursues a relationship with her twin sister as well. Masaki is left reeling, caught between the elation of a chance he never thought he would have and the sheer impossibility of the proposition before him. What begins as a simple confession spirals into a complex emotional labyrinth, forcing him to navigate not only the affections of one girl, but the tangled dynamics of two identical hearts that share an unbreakable bond.