Itsu made mo Musuko no Mama ja Irarenai!

Itsu made mo Musuko no Mama ja Irarenai! - visual novel from Anim studio, which was released in 2015. The main character of the story has long been in love with his stepmother. He tried to hide these feelings and cope with his own lust. However, a chance meeting and an equally random turn of events completely changed his life. Subaru's mother became his mistress of her own free will, until our hero finds himself a girl...