My Dad Is Too Strong

Lee Dojun, a scatterbrained and talentless government desk worker, is pulled into the brutal Murim world after an accident. There, he fights for decades, rising through the ranks of the Heavenly Demon to become an invincible, all-powerful monster. Now, returned to a modern Earth being eroded by mysterious cracks, he vows to live out the rest of his life peacefully. But his plans for a quiet retirement are shattered when he suddenly gains a teenage daughter through a 'dad contract,' forcing the overpowered ex-Heavenly Demon to navigate the trials of high school and fatherhood.