Adopted or children survived

After being defeated and captured, the dragon slayer Leon became a captive of the Silver Dragon Queen. With the awareness of death, he used forbidden magic to curse the queen, but unexpectedly, the queen lost control. He thought that this would make the queen live with shame for the rest of her life, and it would be worthy of the dragon slayer's mission. But two years later, when Leon opened his eyes, next to him was a little dragon girl with a tail...

One day, my wife disappeared. My young daughter suffers from a rare disease with no cure, and life offers no chance to breathe. Just when I was about to give up on everything— I suddenly found myself transported to another world with my daughter. And not just any world… but the dark, terrifying fantasy novel my wife wrote! I have to save my daughter, no matter what.

Brad Lester, once renowned as the strongest mage, vanished from the public eye after the tragic death of his young daughter. While living a quiet life as a lowly day laborer, his beloved wife is murdered by the "World Peace Promotion Association," an organization seeking his power. Driven by a despairing rage after losing everything, Brad sets out for revengeonly to find Valburga, the leader of the Association, has been transformed into a little girl!? Furthermore, she has lost her memories and has nowhere to go. Haunted by the memories of his late daughter, Brad resolves to "help his arch-nemesis regain her memories." Visiting the Olford Ancient Magic Research Institute, the mouse-worshipping town of Brooke, and the blizzard-shrouded village of Lutz, their long journey across the land begins. An adventure fantasy of the strongest mage and his "child" companion!!

Ordinary college student Ryu Danwoo is inexplicably chosen (?) by a young demon he encounters on the street. The demon barges into his studio apartment and makes himself right at home — and from that day on, Danwoo’s perfectly ordinary life is thrown completely off the rails. In order to get his normal life back, Danwoo teams up with his college classmate Sideok and a witch named Jueun to start searching for clues about dimensional magic…