A collection of 4 chapters set before the K – Return of Kings anime. – Blue chapter 「眼鏡屋別サイド」 (Optician’s, Another Side) by Miyazawa Tatsuki – Silver chapter 「お風呂ネコトラブル」 (Neko Bathtime Trouble) by Raikaku Rei – Green chapter 「”JUNGLE”」 (“Jungle”) by Takahashi Yashichirou – Red chapter 「呼び名のその後」 (Aftermath of the Nickname) by Suzuki Suzu