Aniyome Kyouka-san to Sono Haha Chikako-san ~Bijin Tsuma to Bijukubo to Issho~

Protagonist gets invited by his sister in-law and his older bother who is 10 years older than him, to stay with them instead of living alone in an university boarding house. Also staying with them are both his Mother and Father in-law. Peaceful and Happy days ensue until certain things are revealed about his brother. How will this affect his relation with the two ladies in the house?​