Yuu and the others arrive at Mai's villa where the women have fun with Yuu on the beach, get him to lather them up, and cause an unexpected event in the shower room! Meanwhile, Mai also takes bold action to try and uncover Yuu's secret!
When I did become your big sister?
Wann wurde ich denn
zu deiner großen Schwester?
¿Desde cuando soy tu hermana?
¿Desde cuando soy tu hermana?
Depuis quand ?
Da quando sarei diventata tua sorella maggiore?
Desde quando me tornei sua irmã?
Когда я успела стать твоей сестрой?