Wendy broke up with her girlfriend (Seulgi), Seulgi on the other hand felt mad and lonely. One day Seulgi skipped class then she met this girl name Bae Joohyun (Irene) Seulgi thought of a plan, she wanted to make Wendy Jealous by asking Irene to be her fake girlfriend, but as the time goes on she fell inlove with Irene without even knowing it.