Toshiue Tsuma no Yawaraka na Torikago: Ore ga Joushi no Tsuma to Uwaki shitemo Tenohira no Ue

Takumi's wife Haruka is a mature woman who's seemingly good at everything, and he struggles with feeling inferior in the workplace, at home, and in the bedroom. The resulting loneliness causes him to succumb to the seduction of his boss' young wife, but when he and Haruka finally get some time alone, she finds a way to assert her dominance.

(Source: Irodori Comics)