Bug, Host, Please Fix Me

The Demon Lord had roamed the God Realm for thousands of years, ruining countless rising stars in quick transmigration worlds. At last, the Supreme God could take no more and bound him to a newly created little System.

Demon Lord: Should I blow you up or kill you?

The rookie System trembled. S-Sir, wouldn't it be better to just do the missions?

Demon Lord: Oh, I'll blow you up, then.

A short-tempered Demon Lord x a soft and cute System. There is no CP in this story; it's about the Demon Lord and the System wreaking havoc in various worlds.

Demon Lord: When I get mad, I blow up even myself!

System: This Host is seriously vicious!