IMPRACTICALITY + JIKOOK

JIMIN knows what impractical is. He's living it. He has a rather impractical friend, and a rather impractical crush.

But he doesn't tell anyone about the latter.

Or;
Prompt: person A is friends with person C, who's older brother is person B. Person A has a crush on person B, and has fantasies about them. One day, person A goes over to person C's house, to find it empty. Person A waits, and person B soon shows up, and a lot of sexual tension rises.