1 - 20 of 40 Works in Serizawa Katsuya is Trying His Best
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Arataka hopefully can ground himself down to earth and not get lost in his head now. Graduation is right around the corner after all, and Shimazaki-senpai will be leaving.
Meanwhile, Serizawa Katsuya decides on acting on something his cousin told him.
Series
- Part 11 of True Colors
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Series
- Part 3 of My Sicktember 2025 Stories
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A Mob Amongst Quirks by Krisrift
Fandoms: モブサイコ100 | Mob Psycho 100, 僕のヒーローアカデミア | Boku no Hero Academia | My Hero Academia (Anime & Manga)
08 Aug 2025
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In a freak psychic accident Mob and Serizawa are thrown into a world like nothing they’ve ever seen before. In this new world ideas of heroes and villains, and in extension good and bad people, are very set. Violence is a common pastime and the powers they’ve spent a lifetime suppressing are coveted and celebrated.
Or:
Mob is having a no good very bad time and Serizawa was not the best move for responsible adult supervision.
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Serizawa and Shimazaki deal with the bullies at school. It leads to consequences for Reigen, but that only leads to an adult realizing something.
Meanwhile, Reigen realizes something.
Series
- Part 7 of True Colors
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Anna’s stood again, speaking louder so people could hear her. “Okay, new game, 7 minutes in heaven. Who’s in?”
Reigen laughs a little nervously. “7 minutes in heaven? Seriously?”
“Come on! It’s classic!”
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Serizawa gets invited to a house party by his night school friends and ends up realising that people are more complicated than they seem, especially his boss.
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reigen gets jealous and cuts himself bc he is unstable
(also this might be ooc lwk I have no clue 💔) -
〖Putting The Knife Down ≀ Mintz Calisto〗 by Hoilowdare
Fandoms: モブサイコ100 | Mob Psycho 100, Mob Psycho 100
16 Jun 2025
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A retelling of Mob Psycho 100, but with a few new characters, a continuation of the Main story, through the eyes of an Esper-Assassin named "Mintz Calisto."
Mintz, Kageyama "Mob" Shigeo's silent guardian, had been silently protecting Mob ever since the day Mob used his powers for Tsubomi, and Mintz was tasked to eliminate Mob. Mintz refused to harm children, so he struck a deal to watch over Mob to make sure he didn't explode and kill everyone.
Could this be the escape from his chained life he'd been looking for? Or would it have the opposite affect, and ruin his life further?
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When he was a kid, Serizawa Katsuya assumed that adulthood just happened to you.
Four times people taught Serizawa adult skills, and one time he used his own skills to be the adult in the room.
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It was supposed to be a standard job. Lonely widow, haunted mirror, a ghost who didn’t know how to say goodbye.
Serizawa handles the spirit. Reigen handles the client. That’s how it always goes.
But days later, Reigen starts seeing things in the mirror—his own reflection, watching him just a little too closely. Responding when he hasn’t moved. Saying things he doesn’t remember saying.
He doesn’t believe in ghosts. At least, not the kind that wear your face.
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After Serizawa has an incident in his own apartment, he decides to go to a certain man's house to spend the time while the problem isn't fixed.
Reigen fumbles through his feelings with sarcasm; Serizawa navigates his with hesitant kindness.
Neither of them quite knows what they’re doing, but they keep doing it anyway.
This is a slow burn full of missed signals, soft gestures, bad timing, forehead temperature checks, and something tender neither of them can name.No labels.
Basically, just two grown men learning how not to be alone.
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Reigen was meant to die one fateful day, but Serizawa couldn’t accept this fate and ended up putting Reigen accidentally through a time loop to “prevent it”. now the timeline is messed up as it has to constantly rewind to make sure no errors are still in the timeline before it can continue.
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Again and Again- I do it Again by The_ScribesSacrifice
Fandoms: モブサイコ100 | Mob Psycho 100
23 Mar 2025
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I'm at work and can't write a summary just yet. Ritsu over thinks and subconsciously uses his powers. Boom! Time travel.
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Reigen had a bad day at work.
Serizawa wants to cheer him up. -
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The phone rings past midnight.
Reigen Arataka—self-proclaimed psychic, full-time con artist, and part-time insomniac—really should have let it go to voicemail. But rent isn’t going to pay itself, and besides, how bad could one little haunting be?
(Answer: Really bad.)
Because this ghost? It won’t leave. Not for exorcists, not for prayers, not even for a well-placed salt circle. It’s stubborn. It’s old. And unfortunately, it’s not the only one with unresolved issues.
Now, Reigen and Serizawa—two men who definitely don’t have their own baggage (they do) and are completely fine emotionally (they aren’t)—are stuck in a house that refuses to let things go. Forced to confront both a supernatural nightmare and their own questionable life choices, they quickly realize that the only way out of this mess might just be through it.
Some hauntings are about ghosts.
Others are about the people still left behind.And some? Some are just two emotionally stunted idiots who need to get their act together.
Or:
A painfully slow-burn Reigen x Serizawa fic with angst, comfort, and a stubborn spirit that won’t move on.
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I'm Just a Side Character (Please don't drag me into the Plot) by The_ScribesSacrifice
Fandoms: モブサイコ100 | Mob Psycho 100
14 Jan 2025
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Sometimes, people die without warning. Not many can say they woke up from death as someone new. Well, as someone familiar.
(OC-SI as Kamuro Shinji) -
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Separation arc, but Reigen reacts to Shigeo's leaving a little... Differently.
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Reigen receives a Christmas Bonus from a client and learns something new about Serizawa.
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To impress his clients, Reigen invites Serizawa to an event as his 'date,' swearing it’s just business. But after an overthought gift and a night full of flustered glances and jealousy, Reigen’s feelings become impossible to ignore...
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you went through absolute hell to try find serizawa's favourite RPG and he's invited you over to play with him! he has to show you how to play. you have to show him something else