Here's a free link to most of samk novels, you can find payback and payoff here. Just be aware that the blogger posted these BEFORE samk edited/ended her own novel, so there are a LOT of typos and stuff and if you're an mtler it might be very confusing. If you want the published, edited, corrected novel you'd have to read from an official site! https://m.blog.daum.net/banana917411/8
LOL umm okay hopefully this isnt super confusing, but ill talk abt the convo they had that led to their "first" time (technically second time but the uke didnt remember having sex w the seme before, even tho the seme did). My memories are kinda jumbled tho bc its been like 3 years since i read this story lol
Basically one time yoohan/taemin (uke) was trying to find some sponsors/spy on people/or got caught up in his ex's scheme (i dont rmbr well) and he met up w director yoon. at the time our uke didnt realise that director yoon was THE director yoon bc the seme uses several aliases (something like lee baekhwan and jay i forgot) but our uke always just calls him weirdo/ddorai bc of that cigarette incident where the seme overcharged the uke thousands for smoking half of his cigarette. Anyways by then, the seme alrdy figured out that yoohan was the person he was searching for from back then - i dont rmbr if seme was looking for uke bc uke stole his virginity or bc of something inspiring the uke said that helped him in the past (i read too many similar korean novels so they get kinda mixed up lol)
Anyways the seme dragged him to his office and uke finally found out the seme was a big shot, but he still didnt realise our seme was THE director yoon. At the semes office, they were having a conversation abt movies and stuff and finally the uke was like "who tf are you and what do you want from me", and the seme replied coolly, "guess". And the uke was like "oh i bet you want to see [someone] shaking after getting their ass pounded into" and the seme was like "oh how'd you know", then the uke was like "yea, then i guess I'll pound into you real good". The seme then smirkingly replied, "yeah i def wouldnt mind if it was you, thatd be a great first experience", to which the uke was kinda gobsmacked. Afterwards the seme was like "but i think you're more suited to be the bottom", to which the uke was about to say "no one has and will ever top me", but then he stopped bc he remembered crying underneath someone one time and he was like where did this memory come from??? the seme knew he was thinking about their first time together but he still didnt say anything and instead smiled and said "what were you going to say? Go on" and the uke was like confused and corrected himself saying, "no I was topped once...??"
Our uke still didnt remember the incident clearly but the seme knew the uke was referring to his first time with the seme. Seme remembered clearly but he didnt know ukes face bc the uke wore a rabbit mask, but uke didnt rmbr much bc he was not in his right mind and at the time he was working like crazy and only slept like 3 hrs a day for 5 years to pay off his debts. he ran into the seme bc of a big fight and the seme demanded recompensation so uke went with him to pleasure him but ended up being eaten instead lol. Im pretty sure this entire convo led to their "first" official sex scene bc i rmbr the seme going like "cry and shake for me like you did back then" but also i could be wrong and their "first" sex scene mightve been later. Its been like 3 years since I read it so my memory isnt the best LOL
Didnt know i needed this crossover but it's finally been adapted to a webtoon!!!! I remember reading the novel a long time ago and the sex scenes were ~steamy~!!! since fujoking is fine with drawing 19+ I think this webtoon is also going to be yaoi instead of shounen ai, since the novel is yaoi and has extremely mature content and it wouldnt make sense to leave the some of best parts (including how they first met) out of the webtoon!!!!
Edit: the novel has no english translation to my knowledge but i have the korean NOVEL raws of both PayBack and PayOff (payback extras) in .txt files for those can read korean