[Crossover] Don't Just Throw Away the Man You Picked Up

Unofficial Blurb:

The Lord of Evil Gods, who had slept for ten thousand years, awoke from the darkness and unexpectedly became a soft, human toddler. To stay alive, he bound himself to a very strange System, and from then on began his journey to save the world.

System: [Welcome to the Romance Card-Drawing... Oh, no, the World-Saving System! To stay alive, please work hard to save the world!]

#World One: The Taisho Era, When Demons Roam at Night#

The night was as dark as ink, and a red moon hung high overhead. A blond toddler had just climbed out of the water, soaked from head to toe and looking utterly pitiful.

Suddenly, a soft laugh came from beside him. The toddler raised his head...

A mysterious man with black hair and red eyes had appeared. He wore a bloodstained white suit, and his expression as he looked at the toddler was somewhere between a smile and a smirk.

System: [Ding! A character from the story has appeared! Choose the correct answer from the following three options.]

A: Throw yourself at him and call him Dad!

B: Throw yourself at him and call him Oppa!

C: Turn around, go to the police station, and report him. (Just kidding.)

The toddler flashed a cunning smile and flung himself into the mysterious man's arms. With misty eyes, he said, "Oppa, you look so much like my dad, who works at the police station."

#World Two: A Simple, Friendly Place Where Everyone Gets Along#

The blond boy had struggled his way out of a garbage heap, his face smudged with dirt. Just as he was about to wash up, someone suddenly floated by in the river.

System: [Ding! Choose the correct answer.]

A: Pull him out!

B: Join him for a fun swim!

C: Why did Xiao Ming's grandma live to a hundred? Because she didn't live by the sea.

The blond boy poked the person in the river with a bamboo pole and smiled. "By the way, I just saw someone upstream..."

Content warnings: Out-of-character behavior, the protagonist cross-dresses, quick transmigration, and the protagonist loses his memory in every world.

Theme: Save all living beings