Hagiwara Kenji Wants to Be My Brother

[Notice: The protagonist is the biological child of Hagi and Matsuda from a parallel ABO world. Please don’t read if you can’t accept this.]

Hagiwara Zeyu has always felt like a side character in a manga.

His evidence? He looks especially like his father, Hagiwara Kenji, except for his eyes, which are exactly like his dad Matsuda Jinpei’s.

Isn’t that the kind of kid only two manga protagonists could have?!

Then one day, he transmigrates.

Hagiwara Zeyu: Huh? So I’m the protagonist after all?

His adolescent chuuni spirit is burning bright. As it happens, his deskmate Sakamoto taught him a thing or two about acting cool, so he can finally put it into practice. But where’s the System that’s supposed to come with being a transmigrator?

[You have awakened an Acting System. Please play your assigned character according to the requirements.]

[Role: Hagiwara Kenji]

Hagiwara Zeyu: “...Huh???”

There’s nothing he can do, so he tries to act as much like his father as he can, based on his memories. But it seems everyone thinks he’s Hagiwara Kenji’s long-lost brother.

Little Bonus Scenes:

1.

At first, Hagiwara Zeyu thinks he’s arrived in the past, when both his dads were young, only to discover...

Hagiwara Zeyu: “Why does this public restroom only have two categories? Where’s the ABO section?”

Everyone else: “What are you talking about? What’s ABO?”

Hagiwara Zeyu: “?”

Wait, what kind of world is this???

2.

Everyone else: “You two really do look alike, and you even have the same surname.”

Hagiwara Kenji: “Haha, maybe we’re long-lost brothers.” (stares intently)

Hagiwara Zeyu: How am I supposed to explain that you’re actually my biological father? :)

3.

Hagiwara Kenji finally makes up his mind to get a DNA test.

Today is the day he gets the results.

Based on his years of observation, he’s certain Hagiwara Zeyu must be his younger brother.

He excitedly takes out the test report and looks at it...

[Biological relationship: Father and son]

Hagiwara Kenji: ??????????

[Please read the following terms carefully:]

[Important! 1. This is not a wish-fulfillment story. The protagonist grows under the influence of a golden finger. 2. Hagi and Matsuda’s romance is depicted, but it isn’t the main focus. The story always revolves around the protagonist.]

1. The author is useless. There’s no logic or writing skill, and plenty of out-of-character moments. I actually want to write a ridiculous comedy.

2. To move the plot along, I made everyone dumber. Mea culpa.

3. There are a few crossover elements from Sakamoto Desu ga? and The Disastrous Life of Saiki K. They’re basically background details, living in the protagonist’s memories, though they may appear briefly.

4. The protagonist’s CP is Kurosawa Jin. This Kurosawa Jin is not the same person as Gin. If you’re only here for Gin, feel free to leave.

5. The protagonist will differentiate as an omega. He’s rather childlike early on and will mature a lot later (maybe).

6. Aside from canon couples, the only other CP is Hagi and Matsuda. They appear in both worlds. The romance in the normal world is a slow burn, and won’t get a lot of attention, but it won’t get too little either.

(In the ABO world, Hagi and Matsuda are both alphas. In this setting, there’s a very low chance that alphas can get pregnant, and destined alpha partners can mark each other. Matsuda was originally going to be an omega, but that caused too many complications, so the author changed it.)

7. This novel was actually written a few years ago. Finishing it this time is a way of bringing an idea to life. I haven’t read the later Detective Conan plot, so this story diverges from the Rum plotline and has lots of author-invented details.

8. You can’t please everyone. If you come across something you dislike, skip it or leave. Reasonable suggestions are welcome, but baseless criticism and deliberate exaggeration aren’t.

9. If any common content warnings come up, they’ll be added here.

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Theme: Do what you can, and love the people we love.