The special secret to a successful noraebang is revealed! The noraebang where Hee-jin works is for customers who want a call-girl. When they start turning around and leaving, Hee-jin decides to become a call-girl herself and even brings her friend Seong-hee in. Rumors of Hee-jin and Seong-hee's beauty and service quickly spread and more customers come. When they've made enough money, Hee-jin and Seong-hee decide to open their own noraebang and display a hidden special service.

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