Available as both manhwa and novel.
Greatest Boss System
Also known as: Greatest Antagonist System, Peerless Conqueror System, Super Villain System, Tối Cường Phản Phái Hệ Thống, Zuì qiáng BOSS xìtǒng, Система Сильнейшего Босса, Система сильнейшего злодея, 最強覇道システム, 最强boss系统, 最强反派系统, 빌런으로 이직하다 · Zuiqiang Fanpai Xitong · Super Villain System · 最强反派系统 · Peerless Conqueror System · 빌런으로 이직하다 · 最強覇道システム · 最强boss系统 · Zuì qiáng BOSS xìtǒng · Hệ Thống Nhân Vật Phản Diện Mạnh Nhất · Tối Cường Phản Phái Hệ Thống · Zuì Qiáng BOSS Xìtǒng · Система Сильнейшего Босса · ระบบมหาวายร้ายข้ามภพ · 最强BOSS系统
Who is he? Why is he called the Boss? Maybe he’s the fearless ruler of the world. Or maybe the worst enemy of humanity, who tears worlds down. After Su Sin was reborn, he lost all his skills and abilities from former life in a knights’ world. However, a newly implanted System can help him restore them. “My name is Su Sin where Sin means Promise keeper”.