Overwhelmed by the excessive affection and constant intimacy of her clingy, playful boyfriend Sein, Roha ultimately chooses to break up with him. However, seeing how he still treats her as if nothing has changed, Roha is left confused—did they really break up, or are they still together? Amid her turmoil, Yeonjun, a younger man who has secretly loved her for 10 years, suddenly begins lodging at Roha’s house… “What the heck is pure love?!”