Primarily about the relationship which develops between Mitsu, an overly sensitive young man with a tendency to withhold his self-expression to the point that misunderstandings often crop up, and Tsuburaya, a historical novelist who gets so busy that he cannot look after himself, against the background of a boarding house with roommate who care for each other, and school chums who want to create friendships. Mainly an interesting character study and more shounen ai than yaoi.
Link - Boku To Kimi No Aida