Fresh out of high school, Nayeon is heading towards her college far away from home. She wants to leave behind her memories from her hometown, ready to make new ones. But, it's all thrown out of the window when she finds out who her roommate is. She didn't know how it was possible. Out of the thousands of possible people she could've been roomed with, it ends up being with the one person who hates her since high school, Minatozaki Sana.

And if that wasn't a surprise itself, the Japanese girl forms an idea to place red tape in the middle of their dorm room. Boundaries are formed and the temptations to break them are just as large. Will they last, or will it all fall apart?