'Roha', recently ended up breaking up with her cute boyfriend 'Saen' who was too affectionate. However, since he still treats her indifferently, Roha is confused as to whether they really broke up or if they are still dating. Taking advantage of this confusion, 'Yeonjun', a younger man who has had a crush on Roha for 10 years, starts staying at Roha's house... "What on earth is pure love?!"