
he's the mc. there was an incident and he fell into the cliff in that same place they are in rn (the maze dungeon thingy, i forgot what they're called) and somehow went like 10yrs in the past. because of the injury he sustained from said incident he was beyond recognition, his voice got raspy, he was now weak, and had a scar on his face. he would sleep so long that it would sometimes last for days.
he didn't rlly wanted to tell ml who he was and that they were gonna meet in the near future (for ml) because he would ruin the 'reality'. it's kinda funny too since what he tells the ml of the past about the dungeon, all that knowledge was from the ml of the future, so in a way it's kinda paradoxical.
none of the kissing/smex happened in the novel. and the ml admitted that what he felt for ujo hyung wasn't something romantic. he just felt grateful and wanted to repay his kindness. and it is such a huge contrast to the adaptation. in the novel it was all in the mc's head (that the ml loved ujoo hyung that way) and was all like "well, there is nothing i can do abt it. best i could do is ease his pain"
the changes are not necessary. us, bl readers, aren't smut hungry as they make us. i personally think that the original novel had more depth and the feelings of frustration made more sense.