Age gap (older male/younger female)

Lee Byung Hun is 20 years older than Kim Tae Ri

Lee Bum Soo is 20 years older than Im Yoon Ah

Kam Woo Sung is 20 years older than Choi Soo Young

Kim Min Jong is 18 years older than Yoon Ji Yi

Nicky Wu is 17 years older and Kevin Cheng is 18 years older than Cecilia Liu

Lee Seo Jin is 17 years older than Uee

Ji Jin Hee is 16 years older than Han Hyo Joo

Jang Hyuk is 15 years older than Park So Dam

Shin Ha Kyun is 15 years older than Jung So Min

Jang Hyuk is 15 years older than Jo Bo Ah

So Ji Sub is 14 years older than Jung In Sun

Song Seong Heon is 14 years older than Go Ah Ra

Fujiki Naohito is 13 years older than Ayase Haruka

Park Byung Eun is 13 years older than Lee Som

(not the main couple)

Park Hae Soo is 13 years older than Krystal

Kim Dong Wook is 13 years older than Moon Ga Young

Wallace Huo is 13 years older than Yang Zi

Ha Suk Jin is 13 years older than Bona

Lee Ji Hoon is 6 years older than Go Won Hee

Gong Yoo is 12 years older than Kim Go Eun

Rain is 12 years older than Krystal

Nie Yuan is 12 years older than Wu Jin Yan

Yoon Gyun Sang is 12 years older than Kim Yoo Jung

Jang Hyuk is 12 years older and Jang Seung Jo is 7 years older than Park Se Young

Nie Yuan is 12 years older than Wu Jin Yan

Ok Taec Yeon is 11 years older than Kim So Hyun

Lee Joon Gi is 11 years older than IU

So Ji Sub is 10 years older than Han Hyo Joo

Jo Jung Suk is 10 years older than Park Bo Young

Yoon Doo Joon is 10 years older than Kim So Hyun

Lee Dong Wook is 10 years older than Jo Bo Ah

Yeon Woo Jin is 10 years older than Park Hye Soo

Kim Rae Won is 9 years older than Park Shin Hye

Kim Rae Won is 9 years older than Shin Se Kyung

Go Soo is 9 years older than Han Hyo Joo

Kamenashi Kazuya is 9 years older than Tsuchiya Tao

William Feng is 9 years older than Zanilia Zhao

Sato Takeru is 9 years older than Kamishiraishi Mone 

Kim Dae Myung is 9 years older than Ahn Eun Jin

Ji Chang Wook is 8 years older than Nam Ji Hyun

Jung Woo Sung is 6 years older than Soo Ae

Cha Seung Won is 8 years older than Lee Ji An

Lee Joon Gi is 8 years older than Seo Ye Ji

Ji Sung is 8 years older than Hwang Jung Eum

Hyun Bin is 8 years older than Park Shin Hye

Kim Jae Young is 8 years older than Seol In Ah

Park Hae Jin is 8 years older than Kim Go Eun

Song Seung Heon is 8 years older than Seo Ji Hye

Sato Takeru is 7 years older than Ohara Sakurako

Jung Kyung Ho is 7 years older than Baek Jin Hee

Lee Seung Gi is 7 years older than Suzy

Sung Hoon is 7 years older than Song Ji Eun

Joo Won is 7 years older than Jin Se Yeon

Lee Seung Gi is 7 years older than Shim Eun Kyung

Park Seo Joon is 7 years older than Kim Da Mi

Jang Dong Yoon is 7 years older than Kim So Hyun

Lee Seung Gi is 7 years older than Suzy

Song Sae Byuk is 6 years older than Go Joon Hee

Chris Wu is 6 years older than Huang Pei Jia

Choi Daniel is 6 years older than Park Eun Bin