Everything could be a spoiler!
But I will still give a brief introduction of Youngho, because this high school freshman is the protagonist of the last game, The Coma 1, as well as the protagonist of this game. To recap The Coma 1 without giving away any spoilers I'll just say this much: he's a student at Sehwa Private High School, and he's only been in high school for a few months. The Korean Education System usually enrolls new students in March and have their final exams around the end of June, so it's been about 3.5 months.
For some unforeseen reason, Youngho falls asleep during the exam (or maybe it's after?) and ends up in the mirror dimension "The Coma". There, he encounters monsters and ghosts ... and eventually has to escape the nightmare school, which is the story of The Coma 1, although a lot of it is left out ... He doesn't have any special powers, but his indomitable will and observation skills help him get through the crisis.
In this new game, we get to know Youngho's family history and background indirectly, which helps us understand how he has this personality and mindset. There are subtle differences between Youngho's personality in The Coma 1 and Youngho's personality in The Coma 2: Vicious Sisters. It can be said that he has grown a bit more, and the reason why is revealed in The Coma 2B: Catacomb. So, stay tuned!
Talk to you again really soon!
Minho & Dvora Studio
https://store.steampowered.com/app/1781890/The_Coma_2B_Catacomb/