Port Mafia's Nanny, Losing Her Mind Online

Shima Yu thinks he must have been stabbed at the wrong angle that day. Otherwise, how could he have been so easily tricked by the bandage-wrapped weirdo into joining the Port Mafia, becoming his personal assistant, and even getting dragged along when he defected? He was taken in as the boss's direct disciple out of nowhere, and spent every day being brainwashed into dedicating everything to his teacher, body and soul. Then a half-yokai onmyoji showed up and coaxed and tricked him into signing a contract. Recently, even his adorable childhood friend has been looking at him strangely. When the other guy pinned him to the bed with his gravity ability, Shima Yu finally realized-- This is bad!!! Where's his sunny doll? Oh--it defected for a pretty face. Please note: 1. This is a self-indulgent Mary Sue fic. There's OOC, there's a golden finger, and the writing is nothing to brag about, so please read with caution. 2. The main story has no pairing, but the extra chapters will have a confirmed pairing. 3. The protagonist is a coward and a pushover, so don't expect him to stand up for himself. 4. Other worlds may appear in the supporting cast section, including but not limited to the following. Theme: Knowledge can change your fate