Suki na Ko ni Kokuttara, Futago no Imouto ga Omake de Tsuitekitta

One day, when they happened to be alone in the classroom after school, Nakaba Masaki suddenly confessed love to his classmate, Yuzuki Tsubasa, He was prepared to be crushed by her words of rejection, but what he received was a surprising reply: "I'll go out with you, if you'll play along with two-ti