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   Once More, With Feeling by tiny_peach

   Fandoms: 鬼滅の刃 | Demon Slayer: Kimetsu no Yaiba (Anime), 鬼滅の刃 | Demon Slayer: Kimetsu no Yaiba (Manga)  

   • Teen And Up Audiences
   • No Archive Warnings Apply
   • Gen
   • Work in Progress

   16 Jun 2025

   Tags

   • No Archive Warnings Apply
   • Agatsuma Zenitsu & Uzui Tengen
   • Agatsuma Zenitsu & Uzui Tengen & Hinatsuru & Makio & Suma
   • Hinatsuru/Makio/Suma/Uzui Tengen
   • Agatsuma Zenitsu
   • Uzui Tengen
   • Makio (Kimetsu no Yaiba)
   • Suma (Kimetsu no Yaiba)
   • Hinatsuru (Kimetsu no Yaiba)
   • Uzui Tengen's Wives
   • Kamado Tanjirou
   • Hashibira Inosuke
   • Kamado Nezuko
   • Tomioka Giyuu
   • Kaigaku (Kimetsu no Yaiba)
   • Kuwajima Jigorou
   • Murata (Kimetsu no Yaiba)
   • Kochou Shinobu
   • Age Regression/De-Aging
   • Domestic Fluff
   • Agatsuma Zenitsu Needs a Hug
   • and he gets a hug
   • Hurt/Comfort
   • Implied/Referenced Child Abuse
   • DILF Uzui Tengen
   • it's just alternating fluff and crying the whole time
   • Fluff and Angst
   • Angst
   • Soft Uzui Tengen
   • Protective Uzui Tengen
   • Everyone gets therapy via interacting with a toddler

   Summary

   Of all the things Tengen expected in retirement, playing babysitter to a newly de-aged Zenitsu Agatsuma was not on the list.

   Or, in which Uzui Tengen accidentally becomes the father of a very frightened child. He just doesn’t know it yet.

   Language:

   English

   Words:

   161,364

   Chapters:

   21/?

   Collections:

   2

   Comments:

   970

   Kudos:

   2,096

   Bookmarks:

   530

   Hits:

   66,499

   Bookmarked by HA_NY

   29 Dec 2025