The 6th edition of the 15th anniversary year project is a collaboration between S1's popular exclusive actress Aika Yumeno and God! Aika-san, my brother-in-law who is cold to me. One day when I watched AV, I suddenly entered my room! And for some reason I decided to watch AV together! That night, a secret saffle relationship began, saying, "Take responsibility for not being able to sleep!" Is the tsundere attitude when you are with your family a measure against your brother? Or is it just a shame? A forbidden relationship that is completely subjective! Living with a family affair with a brother-in-law who can not be honest!