Fui ni Arawareta, Toshi no Hanareta Gimai no Hanashi

One day, the delinquent boy Ryu was surprised by his estranged father, who made a rare appearance at home. His father left Suiren, a girl 12 years younger, with Ryu, telling him, "This is your stepsister." The life between stepbrother and sister began from there. The two were bewildered by the situa