Walking red flag? Which part? Giving Jiwook books bec he needs it? food to eat bec he knows Jiwook is starving? money bec he knows Jiwook is in financial difficulty? Maybe he come out strong but his intentions are good, that is not a red flag.
Jiwook is the red flag with enflated ego in this story. Just bec he is "pitiful" in the story does not mean he is in the right automatically. Jiwook even hit Seungeon first but the latter apologized. Did Jiwook apologize when he hit Seungeon? No.
So stop being naive with double standard mentality.