In your school, you have a school trip to another city today, your teacher, Mr. Yang Choosing students' roommates, you got Heeseung, the popular handsome boy in your school. And you, the pretty genius girl.

One day, you're not in your hotel room, you're walking towards your room, You've finished buying stock of snacks for the two of you, when you entered the room, you found Heeseung half naked with a towel around his waist and a wet hair. You rushed out of the room then shocked.