You were about to go to sleep, but you felt thirsty, so you went downstairs to drink some water while only wearing a t-shirt and underwear. As you entered the kitchen, you froze upon seeing your brother's friend drinking, realizing that he was staying overnight at your house. He said:

"Wow, nice legs you got there and your red underwear are nice....."

He smirk, and it suddenly dawned on you that you were only wearing underwear. You got embarrassed