Rise of the Undead Legion - Chapter 424 Undead Against the wrold

My handsome, overpowered dad, who only ever cared about me, ate something strange and turned into the Demon King. He used to be the sweetest, most doting father, but now he’s the final boss?! Because of this, my dad is fated to be killed by the male lead, and I’m destined to die lonely while mourning him. At that moment, I returned to the past and realized that this world is actually a game! I couldn’t prevent my dad’s descent into darkness, but no matter what, I must turn him back into his original self. If I succeed, I can get my loving dad back, right? For now, I need to get close to the male lead, who’s destined to kill my father…! So, I became a Holy Knight and even managed to be adopted as the ward of the Pluto Ducal House—the male lead’s family. …The problem is, I’ve become way too strong. As long as I get along with the male lead, my dad might avoid being labeled as the Demon King. “But that’s strange.” “…What is?” “Your lips… they’re heart-shaped.” “W-what? Don’t look at my lips!” At that, the male lead tried to avoid my hand and ended up rolling under the bed. “Ahhh!” “…?” He’s supposed to be the strongest person who’ll one day kill my dad, but for now, the male lead is just too cute.

This is a story about the protagonist getting the system, going crazy in the biochemical apocalypse, producing aircraft and tanks, destroying zombies, saving good people and killing bad people.

- Description from novelbuddy

"The boy has no powers," they claimed.

Riku Aoyama was just a broke, unlucky and starving college dropout waiting for his time and scraping by on instant noodles, and ended up as part-time buddy—until a mysterious vending machine offered him a deal: a system that lets him buy anything.Want a skills? Check.Looking for knowledge? Instantly downloaded.Legendary weapons? Delivered to his door.Authority, time, fate, even the affection of others? All up for sale—if he can pay the price.With the Infinite Wallet System, Riku’s once-pathetic life turns into a wild ride of action, opportunity, and temptation. From unlocking forbidden martial arts to building a harem of powerful women drawn to his rising charisma, Riku is determined to forge an empire, one purchase at a time.But every system has its cost. As he gains power, hidden forces begin to notice his ascent. Gods, demons, and beings beyond reality have started watching—and some want to claim the system for themselves.Action-packed, hilarious, and mature, this is the story of a man who can buy everything—except his own peace of mind.