Reincarnated as the stepson of a mafia mob [BL]

Lee Gongyun is a successful bachelor and a confident man. He is also wealthy and pampered by his family. He loves himself so much that people call him the Narcissistic Prince. He has many achievements, and people respect him for being athletic and having a brilliant mind. Gongyun has it all. The only thing he lacks in his life is romance. That's right—Lee Gongyun is naive and inexperienced when it comes to love or romantic feelings. He is also oblivious to the admiration of others. No one ever taught him about romantic love; Gongyun only understands platonic and familial love. Everything is fine as it is, and he accepts this kind of life. He doesn't complain, convinced that he's living well enough, without any bother. But one night changes everything. He dies at the hands of an obsessive stalker—a stranger who proposes love and takes his life as payment. He wakes up as the stepson of a mafia boss, in a world that is similar to Earth but very different. Gongyun has become the inferior, idiotic son of the most powerful man in the country. Chaos ensues. (The book cover isn't mine—credits to the rightful owner.)