Youth is uneventful, but a sudden turn of events leads to a new life. Unexpectedly, before dawn, disaster suddenly struck. Kungunir circled in search of enemies, and flooded the world with his gluttonous mouth. After waking up from death, he found himself in a fantasy medieval land. Missing his old friend made him embark on the journey back home. But during the journey, he encountered new things and met new people. Returning to Earth again, faced with the deadlock of two worlds invading each other, it is hard to let go of love and hate. How should he choose? Do he have to choose one or the other?