Child Rearing Hero and Children of the Demon King

Chapter 1

A brave who came to defeat the demon king through many difficulties.
But, for some reason, the demon king is already on the verge of death.
「H, hero, huh…… I’m already done for……」
He gasps for breath on the throne.

「Eh, why? What happened?」
「Terminal illness」
「Eeeeh!?」
「I forced myself to sit on the throne until you come, but I can’t go on anymore…… I used up all of my strength……」
「Wait a moment!? What about me who was preparing for an intense battle!?」
「Impossible. No good. I’m going to die」
「Don’t diee!」

The brave hero who shouts for the demon king not to die. The demon king murmurs to such hero.

「I have a request for you……」
「No, before that, don’t die. You are the king of demons, right? Don’t lose to something like an illness」
「Please, take care of my children……」
「Eeeeeh!?」
「I leave these children to you…… no, seriously」
「Waitーーー!! Oi, there are more suitable people for that, your aides for example!!」
「You have defeated them, right? Before coming here」
「Ugh」

There are two children who are about to burst into tears behind the throne.
The same faces and same appearances. The hero freezes.

「Twins!?」
「Please…… raise them…… into splendid demon kings……」
「Would you normally ask that from a hero?」
「You guys…… listen to what the hero says and grow into splendid demon kings…… c, conquer the world……!」
「Stop, stop with that ominous testament」
「「Yes, Papa!!」」
「You guys too, don’t agree so vigorously」

So, the demon king dies.

「…… What am I supposed to do…… I have never raised children before…… even though I ran through my youth just to defeat the demon king…..」

Far from defeating him, the demon king who died of illness entrusted him with his children.

Then, the twins at the hero’s feet look up at at him with teary eyes.

「…… Shit~…… just you wait…… if you resurrect, I will send you flying…… I want to send you flying even if you don’t resurrect, though」