Transmigrated as the Villain’s Master? Let Me Reform the Villain!

[Sweet at first, then a little angst later]

I was just a miserable corporate drone working in the 21st century. After complaining about a book, I unexpectedly transmigrated into it to fix a bug?

How could that be? Well, the villain is pretty handsome... I guess I’ll have to save this poor guy myself. Wait, what do I do if there are two of me?!