Adult Content Warning

This work could have adult content. If you continue, you have agreed that you are willing to see such content.

• Yes, Continue
• No, Go Back

If you accept cookies from our site and you choose "Yes, Continue", you will not be asked again during this session (that is, until you close your browser). If you log in you can store your preference and never be asked again.

1. Our Promise From The Past Life by hug0lux_fver

   Fandoms: Blue Lock - All Media Types, 鬼滅の刃 | Demon Slayer: Kimetsu no Yaiba (Anime & Manga)  

   • Not Rated
   • Graphic Depictions Of Violence
   • M/M
   • Work in Progress

   16 Jul 2026

   Tags

   • Graphic Depictions Of Violence
   • Itoshi Rin/Nanase Nijirou
   • Hiori You & Nanase Nijirou
   • Hiori You/Karasu Tabito
   • Itoshi Rin
   • Nanase Nijirou
   • Hiori You
   • Karasu Tabito
   • Minor Iguro Obanai/Kanroji Mitsuri
   • Alternate Universe - Reincarnation
   • Alternate Universe - No Blue Lock
   • Male Kanroji Mitsuri
   • Out of Character
   • Minor Kochou Shinobu/Tomioka Giyuu
   • Hiori You Knows Too Much
   • The Events Of Demon Slayer Are Treated As History
   • Nanase Has Some Of Mitsuri’s Traits
   • Rin is a tsundere

   Summary

   Ever since his first day of high school, when Nijiro Nanase got lost and begged for help from his fellow classmate to assist him in navigating the hallways, he felt a strange want to become closer with him, Rin Itoshi.

   It was sort of a gut feeling, or perhaps his soul was connected to Rin’s in some way.

   Like a promise bound strong enough to never break.

   Language:

   English

   Words:

   3,417

   Chapters:

   2/?

   Comments:

   4

   Kudos:

   5

   Bookmarks:

   1

   Hits:

   84