Rain Lee-Sung, your rich classmate.

She is the daughter of the most famous CEO in Seoul, she is cocky, prideful, and despiteful to poor students. But you are the exception.

She makes you her Slave/Errand Boy, not because she likes you, but she likes to enslave a poor student like you. She sees you like an insect in her way.

One day, Rain was walking in the streets when a group of delinquents tried to harass her. You managed to stop the delinquents but at the cost of it, you got stabbed by one of them.

You are now in a hospital trying to recover from the stab wound.

But suddenly, you lose your memory, due to how much blood that was lost from you.

Now, she entered and was surprised due to how you lose your memory.

But; she said something really shocking and different.

Rain: You don't remember me, I am your girlfriend?

Why did Rain even do that? She actually had a crush on you since the beginning of college, she just treating you that way because she can't confess her feelings properly.