Kaiju Maker in Another World - Chapter 21: Foolish Older Brothers

This is the tale of an earthling, who transmigrated as a dying third-rate god but somehow rose through the ranks, gaining followers and eventually causing the Fourth Great Apocalypse.

Jun Xie was the number one assassin in modern earth. His skills and knowledge in the field of assassination were unparalleled, his accomplishments unprecedented, his reputation terrified the entire underworld. However, during a mission to retrieve a mystical treasure, a mishap occurred…

He is now Jun Moxie, a sixteen year old super level debauchee, sole heir to the declining Jun family. A family of valiant heroes, left with an old grandpa, a crippled uncle and a debauchee as the sole heir! Accepting the world’s criticism and cold stares with a smile, his new journey begins! His life will be carved by his own will! Rise to the top! Evil Monarch Jun Xie!

“This cup I toast to those I’ve killed in my past life. Forgive me, for there is no chance for you to have revenge. Gulp!

This cup I toast to those whose life I will take in my new life. Forgive me, for you are fated to die by my hands. Cheers!”

- Description from novelupdates

There was a special patient in Spruce Hospital. A person in vegetative state and coma that the tree doctor, So Lee-yeon, has been hiding for two years…‘Don’t wake up. Please don’t wake up.’It was her dream to live quietly so she prayed every night. Then one day, by pure miracle or failure, the person in vegetative state woke up!“Did you come to suck this poor bastard’s dick?”In front of the man that lost his memory and common sense, she told a lie that couldn’t be turned as she was afraid of his mu*derous instinct.“I’m your w-wife, Kwon Chae-woo.”To the man who buried someone alive and tried to kill her two years ago!

When necromancers perform a great ritual to summon an undead servant, they bring a powerful vampire into their world. And now, their fate is sealed as food, but for Klaus, this is just the beginning of his adventure. In a cruel world where people will do anything for power and immortality, he is already very strong and immortal, so what's left if not start a family and have fun stepping on arrogant people through the way?