It's like ao no exorcist world, where they fight against sth like monster/demon who born from human bad thought (only night time). They also do live broadcast whenever they fight them. Orihost doesn't have much talent (or more in bottleneck), where his twin bro have more talent than Orihost, forgot how the Orihost died, and the twin was like the protag in this world. but it's actually not like that, it's all scheme by their adopted parents (i think adopted), bc of certain prophecy or sth like that, so they dug orihost heart (swear i rly forgot whether it's heart or what, so please correct me) then change the heart for Ori twin, that's why the twin has more talent and shine in the original plot, when it's actually orihost talent.
MC took over, he left home w/ reason bc he's join this certain uni so they not suspicious. Afterward MC started practice so he'll be better than twin, he also did live broadcast, but hide his face (he's also crossdress iirc LOL), and ML watched the video and fascinated w/ MC, he even become fanboy and follow MC acc (even tho ML normally is iceberg) Btw ML is from a powerful exorcist family, and he's a genius in it, plus called Little uncle by all family disciple there.
ML moved to next door apartment, and accidentally met MC who's crossdress and locked outside his apartment door LOL he asked ML to help him to get key or sth. When ML saw MC, ML closed the door right away, MC thought ML sees him as perv, ML soon back w/ more neat clothes pffft ML wants show his perfect side to MC. ML even learned how to date, like did candle light dinner which surprised MC. ML also helped MC to shoot MC live broadcast, so it's more like a pro. And most the time so much fans, fangirling over MC figure or the way he killed the monster.
For the twin, he tried to pour dirty water on MC (he did not know yet that MC = his bro), said about MC stole his supposedly prey, but ofc later it's revealed that the twin failed to kill the prey bla bla bla and twin finally know during exorcists tournament that MC = his twin bro. Their parents surprised too and even asked MC to back to home, his twin soon know about the heart exchange, and thought that that heart is his heart, and the talent supposedly the twin's talent, so twin want the heart back and scheme to drug MC, and will do operation when MC unconscious. Did not remember the detail, but ofc the operations failed (iirc ML also come to save MC). The parents+twin was punished and they no longer part of of exorcist community and become normal human, so their live a bit hard since they have to work like normal human. As for MC+ML they become super well known and powerful (iirc they also in a fight w/ monster/demon and become a legend)
That's the gist of it