One night and two days of 1 night and left alone by my wife's sister who suddenly came over

Tatsuya is forced to marry after a huge fight with her husband. He tries to make up, but it doesn't work. At that moment, my sister-in-law Kana was worried and offered to mediate the fight. Tatsuya, who can only be grateful for her help, sends Kana home to get advice, but... he can't hide his excitement as Kana closes her distance without her defense. She takes a bath as if running away, but Kana starts to tell him to go in with her...