I, a former hero who returned from another world, spent my days idly as an unemployed person. But one day, the world changed drastically. Monsters flooded the city, and everyday life quickly fell apart. A giant tree grew and mysterious buildings appeared. The earth was transformed into another world. In this completely transformed world, while enjoying my beer and barbecuing meat, I was fortunate enough to save two high school twin sisters who were being chased by monsters. As a kind and extremely handsome person, I decided to go on a journey with them, not only to find a new place to live, but also to search for their father. In this new world, which is now part of our reality and everything is so ordinary, I have a level 90 combat power. And I am determined to level up as I embark on new adventures at my own pace.