Aniki no Yome-san nara, Ore ni Hamerarete Hiihii Itteru Tokoro Da yo

Based on the erotic game by Orcsoft.

Two respected older brothers.
Two beautiful, virtuous wives.
The younger brother, a horndog who salivates at the chance to taste those wives.

He is you. Circumstances put you between the thighs of your respects brothers' off-limit wives ....