|Full name||Kamifukuoka Ryouta|
|Relatives||Kamifukuoka Kyoko (Step-mother)|
|Manga Debut||Number 1|
Ryouta Kamifukuoka is a Japanese high-schooler living in the Tokyo Metropolitan.
A young Japanese man with a slim build.
Ryouta is shown to have a humble personality, referring to himself as ordinary. Hobbies include cooking, sewing, and catching butterfly pupae to disintegrate them.
After returning home from an exhausting day Ryouta finished taking a quick shower before preparing to dip himself in a bath. Just as he was about to relax in the water, his childhood friend Misaki Fujimino appears from the depths of the bath wrapping her naked body around his. After attempting to remove himself from her grasp he notices that the lights of his family's apartment blacked out. To make matters worse his step-mother, Kyoko had just arrived home, with the intention of joining him.
As Kyoko entered nude into the bathroom, a Terraformar had loomed behind her in a menacing manner. Ryouta seeing his step-mother in danger attempted to warn her. Luckily Keiji and Kanako arrived at the scene and drove it away, denying it three captives.
- He share VA with Akari(child).