"I'll just reveal it myself"
few page later..
okay, I'll bet on risky unknown game so the red hair won't reveal it
I don't understand the logic here, or maybe MC start to grow a feeling toward Nayeon after watching her cry that leads to accepting the challenge, that's what I wish but..
I guess the MC will immune to that poison because of that small graze vs his 777x poison resistance, then to save the girl he must "share" that immunity