After Summoning the Final Boss in Chaldea

I am the last Master of Humanity.

During the Fourth Singularity, I loudly cursed out that great demon king for behaving uncivilly in public and setting the world ablaze. Then I turned around and summoned him in Chaldea's summoning chamber.

The guy looked gentle and refined, but I wasn't blind.

If he wasn't the villain who'd just thrown me into a nightmare, I'd eat all the mapo tofu stored in Chaldea.

He actually had the nerve to use the Heroic Spirit Summoning System to come assassinate me!

"..."

"By the name of the Command Seal, I command you to ki, Cast..."

A doctor who would rather not give his name, but is a huge Solomon fan: "Wait a damn minute!"

Some time later

I am the last Master of Humanity. Oh, it seems I'm no longer the "only" Master.

Though I don't know why.

The real Big Bad suddenly gave up on burning humanity, revealed his flowing golden hair and red eyes, then brazenly settled down in Chaldea and became King Solomon's lap ornament.

The problem is that for some reason, King Solomon is constantly glued to my side, never leaving me alone.

"..."

"I can put up with King Solomon, who I can't figure out at all, but why are you pestering me too, Doctor Roman?!"

Solomon x Doctor story, no CP.

I doodled the cover myself. I'll color it or replace it after I finish another story.

Theme: Cherish life, and think carefully before making a vow