- Title: 스물 (Seumool)
- English Title: Twenty
- Release Date: March 25, 2015
- Country: South Korea
- Genre: Comedy, Romance, Drama
- Duration: 115 min
Chi-Ho (Kim Woo-Bin), Dong-Woo (Lee Joon-Ho) and Gyung-Jae (Kang Ha-Neul) have been best friends since high school. Now, they are all 20-year-olds.
Chi-Ho has a girlfriend, So-Min (Jung So-Min), but he only thinks about wooing other women. An accident leads Chi-Ho to spend time with aspiring actress Eun-Hye (Jung Joo-Yeon).
Dong-Woo hopes to work as a comic artist, but his family's poor financial situation has Dong-Woo juggling several part-time jobs. So-Hee (Lee Yoo-Bi) is the younger sister of Gyung-Jae and she just adores Dong-Woo.
Gyung-Jae is a freshman in college. He hopes to land a job with a large corporation. Gyung-Jae then meets an upperclassman, Jin-Joo (Min Hyo-Rin), who takes an interest in him and he falls in love with.
- Kim Woo-bin as Chi-ho
- Lee Junho as Dong-woo
- Kang Ha-neul as Kyung-jae
- Jung So-min as So-min
- Jung Joo-yeon as Eun-hye
- Min Hyo-rin as Jin-joo
- Lee Yu-bi as So-hee
- Kim Eui-sung as Chi-ho's father
- Yang Hyun-min as So-joong
- Choi-cham Sa-rang as Sa-rang
- Ahn Jae-hong as In-gook
- Na Jong-chan as Dong-won
- Baek Soo-hee as Min-jung
- Song Ye-dam/Song Ye-joon as Ssang-doong
- Han Joon-woo as Club DJ
- Heo Joon-seok as Beom-soo
- Jung Yeo-jin as Beom-soo's wife
- Kim Jong-soo as Dong-woo's uncle
- Hong Wan-pyo as Assistant director
- Kim Chan-hyeong as Head
- So Hee-jung as Kyung-jae's mother
- Park Myung-shin as Chi-ho's mother
- Park Hyuk-kwon as Film director (cameo)
- Oh Hyun-kyung as Dong-woo's mother (cameo)
- Kim Jae-man as Chicken house boss (cameo)
- Choi Il-gu as News anchor (cameo)
- Director: Lee Byeong-Hun
- Writer: Lee Byeong-Hun
- Producer: Lee Sung-Doo, Lim Ji-Moon
- Cinematographer: No Seung-Bo
- Filming began July 28, 2014 and finished November 8, 2014.
- Yoo Yeon-Seok was offered a co-lead male role in the movie, but declined due to scheduling issues.
- Movie made its International Premiere at the 2015 Hong Kong International Film & TV Market (FILMART).