Living together with a tsundere-like sister-in-law who pretends to be cold in front of her brother Airi Kijima

My sister-in-law Airi, who has always been cold to me and who is pretty but difficult to deal with, was caught watching an pornographic movie one day. As a result, she actually watched the movie with me and had a physical relationship with me. From then on, we started a secret affair. Friends life…