Ijiwaru Papa wa Kyou mo Niwashi ｗo Dekiai Chuu!

Chikage is a live-in gardener at the home of his former classmate Ryuji. Ryuji says it's a chance reunion, but the two had a secret relationship from their student days... Despite the confusion, Chikage accepts the job, but for some reason, Ryuji's only son, Keiichiro, becomes attached to him. Unlike Ryuji, Keiichiro is very honest and sweet, and Chikage somehow manages to continue working there, feeling comforted by him. Then, one day, Ryuji makes a shocking proposal...!? "If you become another father to Keiichiro, I'll satisfy you at night. What do you think?" This fluttering in my heart is a warning...! A secret love story between a mean, sadistic father with a child and a muscular gardener who is weak to pleasure! (Source: MediaSoft, translated)