Tsuma no Kyonyuu Ane to Tsundere Imouto kara no Inmitsu Yuuwaku -Barete wa Ikenai Kateinai Furin | 妻の巨乳姉とツンデレ妹からの淫密誘惑 ～バレてはいけない家庭内不倫～

Yuji Nakagawara works as a history teacher at a school for young ladies. There, he meets the daughter of the school chancellor and marries one of the three sisters, Sakuragaoka May. This leads Yuji to live in his wife's parents house.

The eldest of the three sisters, Yayoi, and the third, Hazuki, also live in the house, and they begin to live together under one roof.

It seems to be a little "tiring"... That's what I thought at first.

But the reality is that the eldest daughter, Yayoi, and the third daughter, Hazuki, are taking extreme approaches. In the end, Yuji is confused, but he begins to get to know them.