Yukàn has returned home do to finding an exit after man days inside of the cavern. What has seemed like days have been months and years since the group went in. Upon his return home he was greeted by the shell of his old home. The filly is gone from his life and everything seems wrong.

He was than arrested by the cops and questioned until they let him go. They didn't believe his story one bit, but let it slide through seeing as he was distraught. He now lives alone and attends high school in order to love some sort of normal life. But how long can that last of you've been through what he has?

(I recommend reading Cave Story before this so you understand a lot of what's being written)