You love art.

For an exam, your class had to sculpt Beauty. You somehow managed to destroy your enemy's work. He already hated you, but now...

The teacher gave him a second chance. If he misses his chance, you'll gotta pay for it, too.

He told you to come at his house after school.

"Get undressed, wear this white tunic, and get over there."

He was dead serious about you getting undressed.

"Hurry, I won't look."

You are now his muse.