One day, when the older brother comes home, he sees an indistinguishable bastard flirting with his younger sister... If you look closely, you'll see that he's flirting with his younger sister as if he's wearing a mask of his own face. Oh, why don't you come!A younger sister who thinks she's just me is also a younger sister, but a masked bastard who goes up on her own with Ikesha Shah is also a masked bastard!