My college classmate, Hong Si-hoo, seems to avoid me for some reason wherever I run into him, whether it be at university or the cafe where he works part-time. In addition to her harsh personality, Lee Ha-ru did not like Shihu. Meanwhile, she gets dumped by her boyfriend again because he treats her like a rock. She got drunk out of her depression and suddenly got bitten by Shihu!? She is taken aback and is surprised by the pleasure she feels for the first time in her life… ? After finding out Sihu’s identity, Haru proposes a contract to get what they want, and their relationship begins to take on a different form than before…