He's really tall and musculine with Black hair and yellow perching eyes. He is viper boss

Viper gangster Jaeha-Kwon infiltrated the faction to get the corruption books of congressman Jang Seokjoon, whom he serves. Yoojoon, who successfully caught the eye of Viper boss Jaeha as planned, asked Jaeha to spare his life…

I tied Yoonjoon near chair

“Then can you suck my d**k?"