World Development System - Chapter 330: 261. City of Lights.

A part-time job contract. He became the cold CEO’s imitation boyfriend. He merely wanted to earn a few small bucks and live a comfortable life, but a pity, he was in constant turmoil since then. Well, life had something else for him despite his wishes.“That… beauty, will there be an increase in wages for conversion from ‘boyfriend’ to ‘husband’?”

"With this system, I'll become the world's greatest seducer! If it doesn't kill me first..." I was a nobody, a short fatty Otaku. Then a girl's voice popped into my head: [Seduce a woman within a month or die.]
"What the hell...how? I'm an 18-year-old virgin..."
[7+ looks only. No slam donkeys.]
"You’re forcing me to die!”

Facing annihilation, I had no choice but to join the international community of pick up artists. That’s how my boring student life became filled with craziness and womanizing. I just had one problem: "Why are these guys all insane?"

Pick Up Artist: One who uses specialized tactics to seduce women.

Additional Tags: weak to strong, supernatural, fantasy, funny, dungeon, face smacking, bloodlines, modern, harem, r-18, litrpg,magic, cultivation, martial arts, shameless protagonist, parody, satire, succubus, netori, adult, ecchi, sex, hidden gem, drama, wuxia, adventure, mature, school life, seinen, princess, billionaire, werewolves, xuanhuan, erotic, erotica, romance, revenge, polygamy, psychological, r18, 18, 18+, smut, hentai, comedy, light novel, alchemy, system.

*If you're wary of reading originals, I assure you that I'm a native English speaker and you'll find the writing here to be at a professional standard.

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“One Generation Immortal Venerable” Luo Chen was attacked and reborn and returned to Earth.

He is an ordinary person, facing the contempt of his girlfriend, the ridicule of his rivals, the miserable life of his parents, and the threats and provocations of the rich and young.

He vowed to change the injustice of fate, stand on the pinnacle of this world, and tell everyone that Luo Chen had been here.

- Description from MTL