Nineteen

6 young girls and boys reveal their most thrilling moment; college student Ji-hoon plays drinking bout with his female friends. Dong-geon's first experience at emergency stairs. Young-jae bets on undressing while playing Jenga with his sister's friend. Young-tak visits his girlfriend's house while her parents are out. Jung-woo decides to go to Motel with his old female friend. Jin-seok goes to theater with his tutor, but it's not to watch a movie.

• 
  Kim Min-ki

  Ji-Hoon(지훈)
• 
  Lee Jae-In

  Seulgi(슬기)
• 
  Cha Bo-sung

  Yeong-Taek(영탁)
• 
  Park Jung-yoon

  Ji-min(지민)
• 
  Kim Ji-eun

  College senior(원정)
• 
  Choi Won Joon

  Yeong-Jae(영재)
• 
  Ra Hee-jeong

  Da-hae (다해)
• 
  Kim Cheong-soon

  Dong-geon(동건)
• 
  Jang Moon-young

  Ye-ji(예지)
• 
  Hwang Ji-hoo

  Jung Woo(정우)