I Kidnapped the Hero’s Women

I transmigrated as the mid-level boss who tortures the protagonist and gets taught a harsh lesson. Am I out of my mind? How dare I do such a thing to the protagonist? I was even planning to treat all the protagonist's friends with the utmost hospitality... "Everyone, wait for me! I’ll definitely become stronger and come save you all!” Oh no. He escaped. — Description from novelcodex.org