Nonfiction ～題名のないラブストーリー～

Kouki Inoue, the protagonist and the apprentice manager, is dating Manami Ayasaka (彩坂 愛美), an actress, but due to load of work they barely have time to spend with each other. Despite the lack of time, they feel jealous and overprotective of each other and have continued to feel of each other as irreplaceable partner and are wholeheartedly devoted to one another. But in such an unbalanced relationship the strong love they have for each other may take turn to unexpected as another people appear on the scene, Mitsuru Tsurugi (剣 充), a star actor and a womanizer, and Reina Oosaki (大崎 玲奈), Manami's manager who is experienced and also acts as your mentor.

[From Mobygames]