A linked collection about four sixth-grade classmates, Ayako, Marina, Shogo, and Ryohei, each experiencing an unforgettable first. It portrays the pain, expectation, and loneliness of growing up with a warm gaze.

Four children in the same classroom encounter first experiences they will never forget.

A long-running children's series by Masamoto Nasu. Centered on a trio from Hanayama No. 2 Elementary School, it crosses adventure, incidents, school life, and local community.

A long series that follows a trio's adventures and children's curiosity about everyday life and society.