Choromatsu Matsuno
- 25 years old.
- A NEET.
- A virgin.
- Has zero dating experience.
- Favorite color is green.
- An Otaku. Nerdy.
- Loves J-Pop Idols, especially Nyaa-chan.
- Gushes to girls. Can't talk to them without blushing and stuttering.
- Thinks as the most responsible out of his brothers, even though he's just as lazy. A hypocrite. Too uptight. The straight man.
- Worries about his unemployment.
- Hates being made fun of. Can't take a joke. Quick to anger.
- Has a secret stash of dirty magazines.