Responses
Maybe something here
https://www.mangago.zone/tag/Nipple%20fetish/
It's a dj, but one of the best nipple play stories I've seen (both uke and seme get the nipple treatment: https://www.mangago.zone/read-manga/tiger_bunny_dj_old_man_s_physical_scheme/
Thanks ╮(￣▽￣)╭
Anything yaoi with intense nipple fetish or anything to do with harassing the nipples.