The Two-Dimensional Noble Phantasm King

The protagonist is someone who completes all the System's missions, then returns to the worlds he transmigrated to before, along with some worlds he has never visited, to continue his story. The protagonist is very old! Older than even Yukari.

I wrote this on a whim, so just have fun reading it.

This novel and its characters are entirely fictional. Any resemblance to actual people or events is purely coincidental. Do not imitate.