Have you ever fallen in love with a close friend? Have you ever loved someone who didn't love you back? Have you ever fallen in love with someone you actually thought you hated?

High schoolers Luhan, Sehun, Baekhyun, and Chanyeol know the feeling.

When Luhan ends up falling in love with his best friend, Sehun, he doesn't know what to do. He falls deeper and deeper every day and he doesn't know how to stop. And it doesn't help his slowly crumbling heart when Sehun starts asking about their classmate, Baekhyun.

When enemies Baekhyun and Chanyeol get paired up together for a huge science project that's worth a large percentage of their grade, they have no choice but to work together. Getting past each other's irritableness and stubborness, they actually start to grow a little friendship..and maybe something more.

But Sehun and Baekhyun start to become interested in each other, so Luhan decides to be a good friend and help them, and surprisingly..so does Chanyeol.

Feelings rise and tears are shed when these four are brought into this mess.

Everybody has heard of a love triangle.

But what about a Love Square?