Matsunaga Jun

Matsunaga Jun  (松永 純) is a 27-year-old (28 years old as of Vol. 3 Chapter 12)designer who is a resident of a boarding house that is owned by Miko's uncle. He lives with Sonoda Miko, Akane Hattori, Kentarou Suzuki, Asako Oonuki and Ryoi Houjou. He has been living with the 4 people (discluding Miko) for an unkown time until one day Miko joined the share-house for unkown reasons. Matsunaga appears to have anger management issues as he takes out his anger toward other people and objects a lot. Despite his hotheadedness he is shown to be tender and caring toward the people he cares about, especially toward Miko. He also wears glasses.

Trivia
According to the end of Vol. 3, the author describes him as "I've had it up here with you Matsunaga-san! When I board this manga, he never does anything I want him to. It drives me crazy, but I guess that's what makes me love him so much. I know he doesn't act like the typical romantic male-lead, but don't worry, he is going to have more masculine charm from here on out!"