"When I was drawing the final chapter, my assistant told me they liked the current distance with their relationship, so that reassured me."
Find a new assistant, please.
Fighting with a knife sounds like something straight up Ijin's alley.
Sukjoo and Ijin are definitely going to get along well. At the very least, both of them will have the school under their thumb.
Two year time skip.
Casually drops mention of knowing Tang is a transmigrator with absolutely no payoff, or even a reaction from Tang! What the hell? And now we're already done?
This is a really bad arc.