Kimi wo Suki na Ryuu(2006)

Kimi wo Suki na Ryuu

Hinano, an ordinary girl, is in love with Katsu who dreams of becoming a scriptwriter despite the difficulties of the trade. They enjoy a perfect love until love rivals come to threaten their relationship! Sei, a beautiful boy and compulsive flirt, attempts to seduce Hinano and Juri, an intelligent woman, tries to her hand at getting close to Katsu!
What will become of the couple's love?

(Source: Fate)