"I should have wanted to go back to my friends. I want to get closer than that." Hayakawa Akira, a third-year high school student, changes seats and sits next to his childhood friend Kuno Sumiya. Akira, who has many friends and is active, and Sumiya, who likes astronomy and is quiet. The two grew up in the house next door from an early age and were best friends despite their opposite personalities. However, when I was in elementary school, I had a trivial quarrel, and couldn't say "I'm sorry" to each other, so I was estranged. Akira feels awkward to start preparing for the school festival in the same group, Sumiya has been kind to me as before ...