Marianne's new beagle puppy must try to adapt to human life after mysteriously transforming, but they must be careful when falling in love because hybrids can only mate with one for life. It won't be long until they realize this pup's master might have a few unknown mysteries of her own.

Sometimes the one you hate most ends up being the one you love most. Superstar and diva, Kim Heechul, and SM trainee, Leenah Jung, meet and have an instant irrational hatred for one another. Suddenly several obstacles are crossing their path, testing if their hatred is genuine or a facade to hide something more. In the process, one just might admit feelings for their SM rival. Who will confess first?