年轻的诗（罪恶啊啊），HA（银凯的朴智星）和淳熙（Yoon彩I）有蜂友为15年，自高中。 妍诗是一种精细youngest酒店owner和谢成人的睡眠与她throughout 1203人的生命。在其他的手，淳熙是一个老学校，志同道合的高中教师，谁有性爱之前，从来没有在她32 -生命的东西。 婚礼计划哈恩是在爱与一个男人的10年，但最近的研究experienced牌的失败的人，她都和工作。 有一天，来庆祝他们的第十年的多数股权，他们有一个党，他们在自己的房间，1203科妍诗的酒店。 他们的房子breaks说下，如果三个女孩在一起得到的。 是把提供的3个女孩的谈话是overboard，去进一步比成人评。很快，他们开始poking at each’s和其他nerves端上制作A LTA；他们要遇到一个男人和一个晚上把与他。 他们的目标在酒店bellboy贤洙（李荣勋）谁看了，就像是他在学校的《全三他们用来状。 对他们的prove夜与他，他们必须收集的样本，他们的精液。谁是要去把《热夜与他吗？世界卫生组织slept与酒店bellboy？？？？？？？
Yeong-jae (Sin Joo-ah), Ha-eun (Koo Ji-sung) and Chun-hee (Yoon Chae-i) have been friends for 15 years since high school. Yeon-jae is the youngest of a fine hotel owner and she aims to sleep with 1203 men throughout her life. On the other hand, Chun-hee is an old-school minded high school teacher who has never had sex before in her thirty-something life. Wedding planner Ha-eun was in love with one man for 10 years but recently experienced the pain of losing both her man and work. Then one day, to celebrate their 10th year majority, they have a party of their own in room 1203 of Yeon-jae's hotel. They say the house breaks down if three girls get together. Just turning thirty, the 3 girls' talk goes overboard, going further than adult rated. Soon, they start poking at each other's nerves and end up making a bet; they have to meet a man and spend a hot night with him. They target the hotel bellboy Hyeon-soo (Lee Yeong-hoon) who looks just like the guy at school all three of them used to like. To prove their night with him, they must collect a sample of their semen. Who is going to spend the hot night with him? Who slept with the hotel bellboy?