Is there any other manga with a relationship similar to the sick prince and doctor?

Good question, I want to know too! They should have their own side story

you mean psycho possessive seme x healing naive uke that tries to escape eventually because seme is crazy AF? countless, especially webtoons. Or in what sense do you mean similar?

Any recommendations? Yandere style, with a controlling and possessive character // partner.

have you read Harada's "Color Recipe"?

YES, I love it (⌒▽⌒)

Kinda LOL. Maybe something like the seme has been feeling alone and misunderstood and then the uke pops up and is like “yo I understand u” and then seme is like “wow don’t leave me ily” xD

Well, Make me Bark, Kachou Fugetsu [multiple couples] , 30 days with you [sort of] , if you're okay with twisted, dark and psycho try ; Royal Servant , Okane ga Nai, How sweet is a sugar daddy? , Escape into Oblivion , Lover Boy , Hogu Hagyeongsu. I'm sorry thats what I've read recently that kinda apply. my memory is bad, but there are many others. maybe try http://www.mangago.zone/tag/misunderstood+seme/ or http://www.mangago.zone/home/mangalist/83266/

Thank you so much!!!