The Brother-Raising Diary

[This story will be locked on March 5, with chapters 1-21 becoming subscriber-only.]

[Blurb]

Original title: The Side Character's Child-Rearing Log

Suzuki Soma has just graduated from university and hasn't even found a proper job yet when he learns that his little sister Meisha, who is in first grade and the only family he has, suddenly fainted during gym class for no apparent reason.

After learning that his sister has a serious illness requiring expensive treatment and long-term chemotherapy, Suzuki Soma, with barely over 200,000 yen in savings and nowhere else to turn, starts wondering if he should sell a kidney to an underground doctor.

Just then, a mysterious figure calling itself the [Well-Rounded Child-Rearing System] finds him and says that if he accepts its job offer, it can easily help him out of his current predicament.

Suzuki Soma: "What do you want me to do?"

Child-Rearing System: "It's simple. Just like you raise and teach your little sister, take on the role of an anonymous passerby and deal with a few 'problem children.'"

Suzuki Soma: "Huh?"

With no other choice, Suzuki Soma decides to try anything, even a long shot, for Meisha's sake and signs a contract with the highly suspicious System.

And so:

1. A young Six-Eyed Child of God and a Heavenly Restriction with no cursed energy

2. A silver-haired assassin who hasn't yet joined an international organization, and a middle-school detective from a certain country who loves mysteries and is far too curious

3. A living being with supernatural abilities born in a secret laboratory, and a young genius who lost the protection of their parents and was forced to face the real world too soon

Taking his responsibilities seriously, Suzuki Soma sincerely cares for every one of these "problem children," no matter how mild or severe their circumstances. He teaches them by example according to the goals set by the System, then logs out without hesitation once he's completed each goal, giving each of these not-so-brief relationships a perfect ending.

What he doesn't know is that the two kids he teaches in each world will one day end up on opposite sides, even becoming sworn enemies...

#What do you do when you realize mid-fight that your enemy has the same guardian as you?

#Was he a fake, or was there another him?

[Notes]

1. A child-rearing story with secret identities that aren't really all that secret.

2. Of the six characters' feelings for the protagonist, three are familial and three are romantic, but the main story won't decide who ends up with whom.

3. Only one character will get a one-on-one extra story. It may be based on reader preference and will be at least five chapters long.

4. Each world is expected to run about 40 to 50 chapters.

5. More or less a "heartwarming" story about enemies becoming brothers?

6. The cover is drawn by the author and features the protagonist, Suzuki Soma.

Completed stories in my collection: The Boar of the Zenin Family's Path to Becoming Clan Head, I Picked Up an Injured D.K. Cat

[New stories coming soon]

Whichever of these gets more saves will be written after this story is complete!

The BOSS's Training Manual: How to raise your very own little BOSS (Gin x Black Conan)

For True Love, I Want to Clear My Name: How to pick up a boyfriend in an alley (Hiromitsu x original protagonist)

My Fellow Trainee and I Turned into Bakeneko: How two cats cuddle (Hiromitsu x Jinpei)

Theme: Education isn't about making people know what they don't know, but about helping them do what they've never done before.