Love appears unexpectedly. Whenever, wherever, or to whom it happen, no one knows the exact. Everyone knows, it's not allowed for idols to have an affair with another idol. No one wants to create a scandal! But what if love grows among them?

Kyungsoo secretly had a crush on Seohyun, his sunbaenim. But on other hand, his hyung, Lu Han was crushing on Seohyun as well. Lu Han got looks, he can dance and sing, he spoke Korean perfectly.

At first, Kyungsoo had to let his jealousy feeling away. But he finally cracked up. Seohyun was his, and no one owns her but him, he thought. And he's going to prove it.

"Call me selfish, but Seohyun noona is mine."