GAPS: hanker 

Naoyuki Hasegawa, 37 years old. He has lived a normal, serious life until now, after he started dating his subordinate, Katagiri. Satoshi Katagiri, 30 years old. He is handsome, intelligent, and has a good personality. He is admired by both men and women as the prince of the company, but in reality, he is a playboy with loose morals and a lack of conscience. Hasegawa has always refused Katagiri's advances, but driven by jealousy, he finally succumbs!? (Source: Taiyo Tosho, translated) Note: Includes one extra chapter.