When Yifan brought home a stray cat hybrid, Jongin, Sehun thought that his position as Yifan's favorite was threatened. But that wasn't what on Yifan's mind, and definitely not on Jongin's mind. Sehun wants to monopolize Yifan. Yifan wants to give Sehun a friend. Jongin is confused and scared, and worried.

In a world where Hybrids aren't appreciated much, Suho wants to make a change. That's what he thinks when he comes back from the States and faces how conservative Korea is still when it comes to Hybrid. Asking an attractive Hybrid to help him starting the change, Suho never expects that this start is also a new beginning of something else. A new beginning of time-limited story.