Responses
Lucia ( he's possessive but tries not to show it)
Coffee and Vanilla ( I never really liked it because the girl is too submissive )
Mangaka to Yakuza( he never tells her , but he is actually really possessive)
For Yaoi you can legit pick up any omegaverse the Alpha is always like you're mine ....
Sorry in the end my two braincells could only help this much .
Random Recs ( because I have way too much time)
Namaikizakari
Taming a Shrew
Gokushufudou: The Way of the House Husband
Cat and Dog
Bloody Sweet
The Blood Of Madam Giselle
Emperor And The Female Knight
Dengeki Daisy
any manga (yaoi/shojo/josei) where male lead often tells mc he/she belongs to him