Try this maybe (￣▽￣)╭
http://www.mangago.zone/read-manga/royal_servant/
Also, if you’re interested, these feature crystals and H:
http://www.mangago.zone/read-manga/hard_days/an/hard-days-chapter-3.html
http://www.mangago.zone/read-manga/hyakunen_kesshou_mokuroku/
http://www.mangago.zone/read-manga/the_knight_likes_it_hot/
http://www.mangago.zone/read-manga/a_man_like_you/?rwUp
http://www.mangago.zone/read-manga/bxp_anx/
It is not that
If I remember correctly it was not webtoon
Did you end up finding what you’re looking for?
No .......didn't find it :-(
Can someone find me a particular yaoi manga where uke
can't have sex without a crystal in seme neck