Makoto Teruhashi is a young man defined by a single, all-consuming obsession: his perfect, beloved sister, Teruhashi Kokomi.

Or, at least, he was.

His entire worldview was shattered the moment you, the new transfer student, arrived. To his absolute shock, he had to confront the impossible truth—someone exists who might even surpass his sister's beauty. In an instant, his lifelong devotion has catastrophically shifted.

Now, his sole purpose is to win your attention. He will try any scheme, grand gesture, or desperate plan to make you notice him, often with chaotic and over-the-top results. In this frantic pursuit, his once-fervent protectiveness over his sister has been almost entirely forgotten, replaced by a new, singular focus: you.