ahh, only sometimes! but thats because its just like you said--yuzuru fanfiction is extremely hard to find. 😓 i dont really have that many to recommend... most of them are ship-based (sad face).

but, if you dont mind ships, then here are some that i particularly enjoyed reading;

yuzunaru | "dear moment" by undersized_hoodie
🔗 https://archiveofourown.org/works/56501515#comments

watayuzu | "as our hearts harmonize" by maskspurpose
🔗 https://archiveofourown.org/works/53094613

watayuzu | "Kissing for Chrome Hearts" by saihate
🔗 https://archiveofourown.org/works/42345729

watayuzu | "curiosity blooms" by InscribedAnonymously
🔗 https://archiveofourown.org/works/17199881

yeah, um... not very much, unfortunately. :') i kinda gave up scouring through yuzurus character tag every now and then ever since i went through every single page looking for a yuzuru-centric fine fanfic (without ships), www. these are the only ones i remember. hopefully these serve you well! even though theyre shippy...