Gibo to no Yuuwaku Doukyo Seikatsu ~Tsuma no Haha wa, Gibo to wa Yobenai Bijukujo Deshita~

He and his wife, Remi, became close friends and in a drunk state started going out. They quickly got married when it was found that she was pregnant.

After the birth of the child, their lives changed dramatically, and both were worn out. My wife and I, bewildered by our new life, started living together with her mother to get help with childcare.

One night, when they were getting used to a new life and childcare, the child developed a fever. After a medical examination The two decided to stay in the hospital for a few days as a precaution, even though the symptoms were not serious.

This is the first night, he spent with his mother in law alone.

[From official site]