In Nanami's eyes, someone as sweet and kind as you, would never want someone like him.

Someone cold, distant and uncaring. humorless, even (as he was called by Gojo-san once for not laughing at his stupid antics.)

So he decided to keep his butterflies to himself, to cage them in the confines of his stomach in hopes of never letting them escape too far. He is content watching from afar, the way you laugh with the second years, the way your eyes light up when your gaze lands on something that excites you. He was more than happy to keep his butterflies in their cage.

But he can't deny the way your eyes catch light in that same excitement.

But this time, your gaze is on him.