Their competitive sex with big breasts

Overview

Mira and Yoo-jeong live in the same house. Mira is talking to Yoo-jeong about her boyfriend Min-su, and she makes a bet with Yoo-jeong. Then one day, Yoo-jeong's boyfriend, Hyun-sik, finds out that two women have bet on him and goes home. Come and suggest a one-on-one play...