Tensei Maou to Ponkotsu Yuusha ~Maou wa Kakko Yoku Taosaretai no ni, Yuusha ga Sugu Zenmetsu Shiyagaru~

Summary

Satoru Akahori's latest work!! Michio, a serious but humble office worker, died from overwork and was reincarnated into another world as the "Demon King Michio". The Heroes challenge Michio to battle, but he secretly wants to be "defeated by a Hero in a spectacular manner as a Demon King should". However fate has something else in mind.... A story of the struggles of a former office worker turned into an unparalleled Demon King, with a harem full of erotic beauties, who isn't enjoying his new life.