[DeepL Translation - needs review] Introduction to Volume 1: Aya Tachibana is in the 6th grade of elementary school. Aya and her friends are a little tense at school, and she is constantly worried about her family and her studies. At a cram school, Aya meets an elite group of four boys. Aya meets a group of four elite boys at a cram school, and together with these four guys, some of whom are show-offs and some of whom are cool, they are on a quest to solve the mystery of the missing bicycle....
