Well I thank it was last year i read it and i forgot to bookmark it but i dont remember if it was on this site or on wattpad or Ao3 

But it's a markson (mark & Jackson Got7)

Its starts by Jackson is in China doing a show like who's the murderer I thank and it's a live thang mark and one of the other members went with. Jackson likes mark and mark likes him to but mark is pretending to date one of the other members. 

Also Jackson gets really depressed though the story he feels like no one cares for him and that they keep lieing to him. Mark promised to watch him in the game show but he didnt even pay attention to it and Jackson overheard mark telling some of the members. 

Lay fro exo is in the story so is Henry thay try and help Jackson. 

That's all I can remember but if you know of the story please let me know. Thank you.