From Tapas: Dongkeun and Shi-Jin used to be in love. They used to go on dates. They used to flirt. They used to raise a cat together. And then, they broke up.

The cat ended up staying with Dongkeun and life simply went on.

However, as they say, every pet is simply a tragedy waiting to happen. So when their beloved cat passes away, Dongkeun seeks out Shi-Jin in order to give the cat and possibly himself, some much needed closure.