The 26th manga volume's limited edition will feature an anime adaptation of the special flashback chapter titled "Uchi ga Kita Machi" (The Town Where I Arrived), which explores how Haruto, Akari, and Takashi initially met during their childhood. This chapter functions as a preface to the TV anime and is notably popular. In addition, the 27th limited-edition manga volume will come with a special anime episode that was produced in collaboration with Seo Kouji in its entirety. This OVA serves as the manga's conclusion and signals the end of the series, which has run for quite some time.