Yoon works at an animal hospital. Eunwoo comes every so often to the vet to get treated which gets on Yoon's nerves. In order to treat Eunwoo's wounds, Yoon takes off his mask and is absolutely captivated by his good looks.

With nowhere to go, Yoon brings his back to his home and they start living together. And the closer they get, the more curious Yoon gets...