Jouchou no Isogashii Kaoru-san

Kaoru Kurisu works in general affairs at a security company and he's had bad luck with love all his life. He's just gotten out of a terrible relationship with a horrible guy, and doesn't trust himself when it comes to finding a decent one. Then, one day, he meets the younger brother of the president of his company, Shinobu Inoue. He has gorgeous black hair, chiseled looks, and a sculpted body. Not only that, he is a pure-hearted soul who's never been in a relationship... Kaoru tries to suppress his attraction to Shinobu by reminding himself that Shinobu is his boss's brother and that he's only been unsuccessful in relationships, but his feelings for Shinobu finally explode... (Source: Renta!)