Have you read Namaikizakari?
http://www.mangago.zone/read-manga/namaikizakari/
A bit slow but honestly one of my favourite mangas of all time. The boy is very possessive (:
Honestly, I just went through your list (lol I swear I'm not creepy) to see if I'd like anything as well and saw Namaikizakari. You've read many of what I've read haha. You probably have read this, I scanned through your read but didn't see Sekaiichi Hatsukoi? I don't wanna be that person that suggests the mainstream kind of shoujo mangas, but em just in case?
Also this probably isn't what you're looking for. There's no possessive male leads, but just a very sweet and gentle romance between two girls. Very shoujo-ess, so I thought I'd just throw it in there. Oh and this one http://www.mangago.zone/read-manga/eventually_i_will_become_yours/
Yagate Kimi Ni Naru (the published name is 'Bloom into you') This is actually gonna be an anime (: (They'res a trailer for it) The couple is so cute, and sweet <3 The manga
Hey guys!!
Can you please suggest some really good shoujo mangas.
I’m really into possessive/over-protective male leads and it’ll be REALLY great if it has a love triangle twist to it
Thank you!! ⁄(⁄ ⁄·⁄ω⁄·⁄ ⁄)⁄