MEYD-518 Living together with a sister-in-law who is cold in front of her brother and a tsundere who is actually a sex friend Airi Kijima

My brother's wife, Airi, is pretty but kind of cold to me. - One day when I was watching an AV, she suddenly came into my room (sweat). And for some reason, she didn't go out and decided to watch the AV with me! That night, she said, ``You should take responsibility for not being able to sleep.'' - She crossed the line with her sister-in-law and started a secret sex friend life! Is her awkward attitude when she's with her family a way to hide her embarrassment from her husband? - Domestic affair with my brother's wife who I can't get used to!