Words of Devotion (2007)

Ootani and Tachibana have been inseparable since high school. Now that they're in college, they live together, they're happy and everything seems prefect. But their little world is disrupted when they meet an old high school friend, Yuki, who seems to have a crush on Tachibana, making Ootani feel jealous and insecure. Will Tachibana really choose him over a pretty girl?