Mr. Arihara's Secret Circumstances (Synonyms), Тайные обстоятельства г-на Арихара (Synonyms), 有原さんの秘密の事情 (Synonyms), 有原先生的秘密情事 (Synonyms), 아리하라 씨의 비밀스런 사정 (Synonyms)
From Exiled Rebels Scans:Arihara Keigo - he excels in any role he plays, and he has a few awards under his acting. Arihara meets Matsushita, an idol and his co-star who struggles with acting. One day, Matsushita mistakes the dressing room and discovers Arihara's secret. The "aloof and mysterious" Arihara that everyone loves is actually a clutz with a sweet tooth! As the two become friends, Matsushita becomes interested in Arihara's real personality...!?