Baby Brother (Genya age regression one shots)

Series Metadata

Creator:
Series Begun:
2025-10-22
Series Updated:
2026-07-04
Description:

series of one shot fics of baby age regressor Genya with Care giver Sanemi.

Notes:

-Mostly set in a modern au
-It is only Sanemi and Genya, the rest of the Shinazugawa family (sans their dad I guess) is alive but lives else where

Genya Shinazugawa
-Regresses very young baby/toddler age (1-3) very rarely can be as old as 5
-Not very vocal when little
-Has ARFID, it is better managed when Genya isn’t regressed but a huge struggle when he is little
- is asthmatic as well
-Genya loves Bluey and has watched it many times over has a larger Bingo plushie
-Tends to have accidents when he is very little
-Much of his age regression is involuntary
-Does not like being alone when he is little

Sanemi Shinazugawa
-Is Genya’s guardian and main caregiver
-Is still a math teacher I love that for him
-Is dating Giyuu
-Is trans (it may not come up though)

Tomioka Giyuu
-Is still a P.E Teacher
-He and Sanemi started as co workers and eventually started dating
-Spends a lot of time at Sanemi and Genya’s apartment, has keys to it as well
-Is not a care giver but has looked after Genya when he is little before as of "Giyuu Saves The Day" Giyuu is now the secondary caregiver for Genya.
- is autistic
-is also trans
- as of "Giyuu Saves the Day" he lives with Sanemi and Genya

 

More points maybe added as the series progresses

things I don't write
- messing/scat
- breastfeeding/nursing
- anything sexual
- corporal punishment

if you would prefer you can send suggestion to my tumblr: siverfanweedo

Stats:
Words:
67,407
Works:
28
Complete:
No
Bookmarks:
9

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