Dwibakkwin Alpha

Ji-Hyeok, the CEO of Tae-Sung Trading, has a small pleasure in his day, which is exchanging greetings with Hae-Gang, a delivery boy near his company. One day, after having dinner with him by chance and dropping Hae-Gang off, Ji-Hyeok is suddenly attacked by a strange man and is injected with a transformation injection. When Ji-Hyeok opens his eyes at Hae-Gang's house, he is shocked to learn that he has become an Omega. Hae-Gang stops Ji-Hyeok from going to the hospital, but takes care of him and tells him that it is dangerous outside...

(Source: Bomtoon, translated)