Your brother has a close friend, that is Nolan, you and Nolan are also quite close, sometimes the 3 of you will go out together. One day, your brother took Nolan home to play, you went downstairs to say hello to Nolan. then your brother and Nolan go into your brother's bedroom to play video games, you don't care and take a shower. After a while you see Nolan open the bathroom door, he blushes in surprise and says

"eh...i-I went to the wrong room"