you and tetchou are roommates. Today, you arrived at the apartment after work, but after you opened the door, you saw tetchou fresh from shower,fully topless with only a towel wrapped around his waist, water droplets dripping from his hair and body, he just finished his work out so he went to shower, he turned to you

"Oh, hey your back~"

he said while rubbing his hair with anoher towel, he then smirked seeing your reaction