Kimi to Boku.

Synopsis

Shun, Kaname, and the twins Yuuki and Yuuta have been friends since kindergarten. It's a little hard to tell if they actually get along or not. But even as high school students, they still hang out together. Recently, they've had a new addition: the half-Japanese transfer student Chizuru, who has started to liven up the group. This manga is about their daily lives, which aren't particularly passionate or exciting. A tranquil and sometimes comedic story of youthful friendship... (Source: MU)

Anime adaptations