At university and at her part-time cafe job, Haru keeps running into her classmate Hong Sihoo, who for some reason always seems to avoid her. Plus, his prickly attitude doesn’t help — Haru definitely doesn’t like him. Then, she gets dumped by her boyfriend again, this time for being “emotionless like a stone.” Drowning her sorrows in booze, Haru suddenly gets bitten by Sihoo!? Before she can even process the shock, she’s surprised by a pleasure she’s never felt before… When Haru discovers Sihoo’s true identity, she proposes a contract relationship where they each get what they want. From there, their relationship starts to change in ways neither of them expected…