Younghoon is a struggling new single father. On his first trip to the supermarket with his daughter he is totally incapable of dealing with her first tantrum. But school teacher Changmin stops the tantrum with ease, then gives Younghoon his number in case he ever needs him again. (this wasn't my idea. Credit goes to the original person.)

They lived in a universe in which everything turns to color once you touch your soulmate. Changmin grew up thinking color was his "default" not knowing he met his soulmate already. It was all in color for him since he could remember. He's grown up now and can't seemly find his soulmate. Will he ever?