Yandere's Guide to Redemption

I am an undercover bodyguard and toolman for the underworld master's family. He is unstable and ruthless. Just when I thought I was about to complete my undercover mission and successfully escape. But the gangster young master locked me on the torture rack in the basement, with a whip in his hand and a mocking expression on his face. "I said that I hate others betraying me the most."