He became an orphan when he was a baby, his parents abandoned him for unknown, selfish reasons. He had been living in an orphanage for so many days. With the countless days ticking on his back, he was no longer interested in making conversations at all. So he decided to stop talking no matter what. As soon as he’s able to understand what parental figures are, he begins to wonder where his parents are and why they did not take him back.

When he was adopted, he was not exactly thrilled with the fact that it’s random parents, not his real ones. Although he is happy that he is living with Ilhoon but with Adila, not so much. Unfortunately, he did not get a chance to experience a loving, safe home for a month. One day, his parents were arguing so badly that the argument had led his father to beat the mother to death. Of course, Kevin was there to see the whole thing. Oddly enough, he was completely satisfied to see an annoying voice suddenly stop until his sister was crying very loudly. For a miracle, John was able to understand Kevin and took the girl away to gouge her out.

When John filled his adoptive daughter’s organs into the bucket, he saw Kevin take the bucket and play with it with Ilhoon. With that, John knows Kevin is already on board. After moving away to an abandoned land with a house, John taught Kevin about how the operation works his way. After struggling dynamic, Kevin finally understands the whole thing and does the work for John.