Childhood friends Nishio and Kuro are known as “Owner and Pet” around school, since Kuro is always following Nishio around like a puppy. However, Nishio learns that Kuro’s feelings are more than platonic when he confesses his love to him. Initially rejecting Kuro, Nishio agrees to a trial run relationship, but he soon finds out that this puppy might be more than he can handle!