Responses
I think u got that wrong. He didn't flinch he came towards the front with the boss behind him and thought that the guy would come at him so he even went into his fighting posture but that man ran past him towards his boss which caught him by surprise in that split second of course he couldn't stand between him and take the knife

Nah I dont like how the author did Jun. He has been loyal to the Boss. Making him lose arm wrestling...fine but making it seems like he is useless when his boss faced danger is crazy. So the guy that has been protecting and fighting along side him suddenly flinched and wasn't able to protect the boss??? Lmao.