Nagi Seishirou is a rather lazy boy, but he is always good at everything including studying. On the other hand, Reo Mikage is a boy with great will and determination and a brilliant genius worthy of being matched with Nagi Seishirou. The two have been classmates and have been best friends since they were very young, however, it is undeniable that Nagi has a feeling far beyond friendship with Reo, but Reo does not know. Despite the gender barrier, Nagi always wanted to follow Reo all the time.