The exclusive edition of the twenty‑sixth manga volume will feature an animated adaptation of the well‑known flashback chapter "Uchi ga Kita Machi" (The Town Where I Arrived). The narrative shows how Haruto, Akari and Takashi first crossed paths as children, acting as a prelude to the television anime.
The exclusive edition of the twenty‑seventh volume will contain a special animated episode created in close collaboration with Seo Kouji. This OVA presents the animation of the manga"s conclusion, as volume twenty‑seven marks the final installment of the long‑running series.