oh absolutely, try "rainbow city" NOVEL. OMFG MAJOR KWAK WAS THE DEFINITION OF A MAN. (spoilers)
When Dr.Seok told him "I don't want to die" unconsciously, while he was sick, HE MADE SURE HE LIVED, EVEN IF IT MEANT GETTING 4 BULLET WOUNDS OR JUMPING OUT OF A BURNING HELICOPTER. then proceeds to survive knowing Dr.Seok was waiting for him and would be sad if he died.
this man would rather the world continue to be in a state of apocalypse than have dr.seok die, LITERALLY. IF THATS NOT THE DEFINITON OF "i would burn the whole world for you" IDK WHAT IS. At first ofc, he did his own thing, didn't listen to anyone BUT SLOWLY, VERY SLOWLY, HE AND DR.SEOK BECOMES OBSSESED WITH EACH OTHER. Dr.Seok being his weakness while being the weakest man in rainbow city and Major Kwak being literally the strongest man. IF THAT'S NOT BEAST/TAMER, I DONT KNOW WHAT IS. There's a manhwa too, but its slow burn and manhwa isn't there yet so I rec the novel. (SA in chap 2 of novel and chap 3 of manhwa best to skip)
https://www.mangago.zone/read-manga/dangerous_convenience_store/ would literally kill for him
https://www.mangago.zone/read-manga/eyes_speak_more_love_than_the_mouth/ tamer/beast
https://www.mangago.zone/read-manga/tonari_no_metaller_san/ sun/moon
https://www.mangago.zone/read-manga/monetary_love/ tamer/brat
https://www.mangago.zone/read-manga/checkmate_1/ sun/moon
https://www.mangago.zone/read-manga/honey_trouble/ angel/devil
https://www.mangago.zone/read-manga/don_t_mess_with_the_puppy/ tamer/beast
Some of this don't have exactly possessive MLs but do have those dynamics
I recently started really gettin back on BL stories with possessive MLs who have an angel/devil, sun/moon or tamer/beast dynamic with the MC, where the ML is like the whole "I would burn the whole world for you." kinda deal, cause he only cares(/prioritizes) for the MC and yara yara yara.
So... Could I get some recommendations for anything similar? Doesn't need to be anything fantasy related or dramatic or grand, just the dynamic is my priority