From Weakling to Nemesis (Uncensored)

Alternative:

I double my strength daily with Clone Technique / 분신술로 매일 두 배씩 강해짐 / From Weakling to Nemesis / De debilucho a némesis

A weak guy wishes to be stronger—and his wish is granted, but with a twist. Instead of raw power, he gains the ability to create clones, doubling his strength with numbers. But there’s an unusual way for him to grow even stronger… and it involves something far more intimate.