Sezon 0

Itsuki is frustrated after his manuscript gets rejected by his editor. He hangs out at home with Chihiro (his younger “brother”), Miyako, Nayuta, and Haruto. Light banter, comedic rejection & friendship moments.

Nayuta and Miyako reflect on how they met Itsuki and how their friendship developed. Some cute or comedic character build‑up.

Itsuki travels for inspiration with Nayuta and Miyako, then is dragged along by some other friends (like illustrator Setsuna) to places like Okinawa, Hokkaido. Small adventure vibes.

After work/manuscripts are submitted, the friends gather for a board game session. Itsuki reveals his feelings for Nayuta to Haruto (not knowing she heard). Ends with a reveal that one of his novels is going to be adapted into an anime.

Kaiko is introduced in the regular anime series during episode 6, "Having Your Media Developments Go Well Is All You Need." In this episode, Itsuki meets the refined manga artist to discuss his work, only to discover she shares his love for little sisters.

The special features super-deformed, or chibi, versions of the characters in a two-minute episode.

The anime series itself is a comedy about a novelist, Itsuki Hashima, whose life is dominated by his obsession with "little sisters". The special episode likely focuses on one of the supporting characters, Toki.

The special episode focuses on the character Setsuna and is a short, 2-minute installment.