Kujo Minato is in the spring of his second year of high school. He finds himself living with Ninomiya Airi, a silver-haired, blue-eyed girl who was the talk of the entrance ceremony for being an incredibly beautiful new student.

Minato, despite his unremarkable appearance, is exceptionally considerate towards Airi.

Airi, who maintains a pasted-on smile or a blank expression in public, gradually begins to show a range of emotions at home.

They spend their time together in a small, six-and-a-half-tatami-mat room.

"Shall I make dinner tonight?"

"N-no, it's fine. I'll prepare it right away. I'm sorry!"

"Hey Kujo-senpai, could you please stroke my head a little more?"

"Oh, if this is all right, then as much as you like."

This is a story about a boy who feels compelled to be considerate towards those he holds dear, and a girl who, precisely because of her captivating looks, has grown to dislike interactions with others, as they gradually become irreplaceable to each other.