Fish

Vol.1 Chapter 2: The Doll Princess
Vol.1 Chapter 1: The Immortal Hao
Vol.1 Chapter 3: Detour
Vol.1 Chapter 1: The Immortal Hao
Vol.1 Chapter 3: Detour
Fish is the sequel to Pet, it picks where both the ending of Pet manga and anime left, and focuses on the future lives of the story's "pets", in particular Hiroki, Tsukasa and Satoru.