If you're a part-timer, experience as a bad customer is essential

Overview

"You can't have someone who's unfair like a customer." Yoomi is finally showing off her skills as a part-time job master. Dongkyu is laughing at Yumi more and more. "You look prettier when you smile." Kisung squeezes in between the two. A full-fledged war of nerves between two fiery men!