[An utterly altruistic, stoic, overpowered dragon-pride protagonist × a flirty, smooth-talking man who adores men]
Hero Mercury has been at it for six hundred years. Since he can't die, he's never retired.
Then his planet blew up. His job was gone, but he was still alive.
The System told him: There's a new position available. Villain. Interested?
"Will I die?"
"Yes."
"Where do I sign up?"
After binding with the System, Mercury began his life as a villain.
Be a villain, seek death, fail, and keep seeking death.
World One: Post-apocalyptic wasteland
The protagonist is an SSS-ranked ability user at a survivor base. He's an experimental failure abandoned by a research facility.
3721: Quick! Get to the East District lab and grab the serum sample before the protagonist's group does, then smash it right in front of them! That's the first step to being a villain!
Mercury: OK.
After carrying it out, Mercury stood amid the ruins, waiting for the furious protagonist's group to surround him and smash his brain to bits.
But the other man only stood a few meters away, staring fixedly at him as the corners of his mouth slowly curled upward.
: You're here.
Mercury: Who are you?
World Two: Supernatural resurgence
He's an NPC in a horror game, and his mission is to hinder the protagonist's progress.
3721: Weird. The protagonist in this world should be a character controlled by a player... But according to the backstory, it seems he died a long time ago.
The protagonist died unexpectedly, and Mercury was about to leave this world, but his attempts to teleport out kept failing. Meanwhile, he began dreaming frequently.
In his dreams was an old mansion, where a boy who looked exactly like him called him "Big Brother."
Mercury entered the mansion and pushed open the bedroom door.
The breathing behind him stayed right against the back of his neck.
: Big Brother, you're finally back to see me.
Mercury: (to 3721) System. Is a ghost who won't let go of his big brother the protagonist of this world?
3721: [Host, let me explain. The ghost in a horror movie and the ghost in a romance game aren't the same...]
Mercury: So I'm the protagonist of a romance game?
3721: […That's not what I meant either.]
World Three: Interstellar future
Mercury is the dead last student at the Imperial Academy, with an F-rank in mental power, and the protagonist's best buddy... at least until "the person he likes is drawn to the protagonist."
3721: Host, the protagonist of this world is an overpowered dragon-pride ace. Your mission is to frame him out of jealousy! Sabotage his mecha! Ruin his tournament! Leave him disgraced!
Mercury: Sure.
Mercury did as instructed. The mecha's performance plummeted, and the protagonist nearly died during the tournament.
Afterward, the protagonist dragged him back to their shared dorm room.
As Mercury was shoved onto the bed, he thought: This is probably revenge. Maybe he'll choke me to death? But that doesn't seem very effective. Maybe tomorrow I should take the protagonist's mecha and feed myself to the Zerg.
The protagonist leaned over him.
Until dawn.
Mercury really was close to dying.
From a whole night without sleep.
Mercury: (sprawled on the bed, eyes vacant, voice hoarse) ...System.
3721: [...Here.]
Mercury: Is he taking revenge on me?
3721: [What do you think, Host?]
Mercury: Why does he keep asking if it hurts, if it feels good, while he's taking revenge?
3721: [Host, please close your eyes and go to sleep. I'm begging you.]
World Four: ???
Here, Mercury met another version of himself.
Worse, this other self seemed to like him a lot.
3721's voice was more serious than ever:
[Host, an abnormal timeline has been detected. This person... is you from another worldline. In that world, you never met me. You waited alone for a hundred years amid the ruins of Tiyal Star.]
Mercury almost wavered and decided to stay here with his other self, but another hand caught his wrist from behind.
: ...Don't go.
: Don't leave me.
World Five...
The Demon King, Stafalo, woke from a nap to discover that his clothes had been stripped off.
He was so angry he laughed.
He got even angrier when he caught up with Mercury. In every world, Mercury was busy trying to get himself killed and never even looked at him.
Fine. If you won't look at me, I'll put on a show for you.
What kind do you like? Loyal, aloof, devoted, or hot and cold?
I can be any of them.
You'd never recognize me anyway.
Theme: They're all your predecessors buried in these fields.
