After Reincarnating, I Wrote the Villain Education Handbook Myself

After accepting a world-saving mission from some chuuni goddess, Ning Xi was reincarnated in another world, where he happened to encounter the ultimate villain as a child.

As the saying goes, the easiest way to deal with a villain is to go back in time and take him out before he grows powerful. But Ning Xi, who was a schoolteacher in his previous life, couldn't bring himself to do that.

"Education! Give him a thorough education!"

"Everyone out there is a bad person. In this world, I'm the only one who truly cares about you!"

That's right. Just tie him firmly to your side like this and teach him with care, and he'll surely become...

"A teacher instructs and nurtures his students. The first part, sir, you have mastered. But as for the second..."

"Wait, wait, wait! I'm your teacher, you ungrateful brat!"

...A student who seduces his teacher!