Hmm I think you’ll like this one https://www.mangago.me/read-manga/the_love_doctor/
https://www.mangago.me/read-manga/i_m_more_dangerous_than_you/
https://www.mangago.me/read-manga/manipulate_my_heart/
https://www.mangago.me/read-manga/hone_no_nazuki_made_aisu/
https://www.mangago.me/read-manga/your_fetters/
https://www.mangago.me/read-manga/seasons_in_bloom/
https://www.mangago.me/read-manga/monomania/
https://www.mangago.me/read-manga/saeism/
https://www.mangago.me/read-manga/oni_ure_idol_ga_kyou_mo_watashi_wo_oshitekuru/
https://www.mangago.me/read-manga/dang_e_yi_yu_dao_bing_jiao/
Can anyone recommend a GL where the FL is possessive and nonchalant