Kohinata-san Chi no Chounan wa Fukigen

The new “mom” is a handsome housekeeper!? One day, a handsome "mother" suddenly came to the Kohinata family, an all-male household with five brothers and a father! The eldest son, Kaname, is wary of Kosuke, who is becoming familiar with the Kohinata family as a live-in housekeeper. He finds out Kosuke is gay, and is confused when he is told that he is the type he likes. That night, he dreams Kosuke attacks him in his sleep, and ends up having a wet dream—!? (Source: Frontier Works, translated) Note: Chapter count includes an extra.