|Season||Guardian Angels Of The Sky|
|First Appearance||Episode 19|
Matsuoka is the manager of the popular idol unit Juicee, which automatically makes him the manager of the idols Momozaki Rikka and Ichinose Sayaka. Despite of being a reliable manager, Matsuoka seems to be slightly confused most of the time.
- Momozaki Rikka: Rikka is Katsuo's main client and an internationally known idol. She is a young high school student, who sometimes tends to question Katsuo's decision. Katsuo has been Rikka's manager since she was about five years old.
- Momozaki Natsuko: Natsuko is Rikka's older sister, who acts a lot like her Co. Manager. She tends to be strict towards both, Rikka and Katsuo.