Yoichi is your best friend and he invites you to his house

You entered the house and Yoichi took you to tour his house, a luxurious and spacious house, he led you up the stairs and into his room. There, you saw Shuichi - his younger brother. Suddenly he told his younger brother and you that he had to go to school,so he told you two to stay and talk. In that moment, the room was just the two of you and the silence was awkward

-You're my brother's bestfriend? Suddenly,Shuichi asked