The Devil Is Extremely Weak, but the Brave Wives Are Super Strong!

In my previous life, I was the demon king who made the three worlds tremble. I died in a joint crusade by five brave men. In this life, I was reborn as a weak and sickly good-for-nothing high school student. I thought I could live a peaceful life... Until the first day of school, I was blocked by five beautiful girls in the school toilet.