KDrama with 3 or more couples till the end / Multiple couples

I want drama which forms 3 or more couples till the ending. Please don't recommend longer dramas with more than 30 episodes.

I'm fine with 30 episodes but not more than that. And try to recommend something after 2013. Mention the couple's also

Examples - 

Because this is my first life ( best drama)

Master's sun

Queen of Reversals

Another miss oh hae young

The woman who still wants to marry

It's okay that's love

Oh my venus

I need romance 3 (something like this)

 Czakhareina:

• Reply 1994 (2013 | 21 episode)
  • Najung - Trash Oppa
  • Samchunpoo- Yoojin
  • Bingguere - Jinyi
• Welcome to Waikiki (2018 | 20 Episode)
  • Donggoo - YoonA
  • Joonki - Seojin
  • Dooshik - SooAh
• Secret Garden (2011 | 20 episodes)
  • Raim -  Joowon
  • Oska - Yeonsul
  • Ahyoung - Secretary Kim
• Reply 1997 ()2012 | 16 episode)
  • Shiwon - Yoonjae
  • HakChan Yoojung
• Reply 1988 (2015 | 20 episode)
  • Dukseon - Taek
  • Sunwoo - Hyeyoung
• Descendants of the Sun (2016 | 18 Episodes)
  • Mooyeon - Shijin
  • MyeongJoo - Daeyoung
• Girls Generation 1979 (2017 | 8 episodes)
  • JungHee - Dong Moon
  • HyeJoo - Young Choon
• Go Back Couple (2017 | 12 episodes)
  • JinJoo - Bando
  • Jaewoo - Boreum
• Fight My Way (2017 | 16 episodes)
  • Aera - Dongman
  • JooMan - SeolHee
• Strongest Deliveryman (2017 | 16 episodes
  • KagSoo - DanAh
  • JinGyoo - JinYoon
• High Society (2015 | 16 episodes)
  • Yoonha - Joonki
  • Changsoo - Jiyi
• Short (2018 | 4 episodes)
  • Hoyoung - JIna
  • Eunho - ManHee

Thank you so much. I've watched secret garden and i will check the other ones

Age of Youth

The Lover

-depicts four different couples living together in one apartment complex. I thought it was really funny, kinda gets raunchy for a Korean drama

Room 609: Both in their thirties, Oh Do-si is a voice actor and Ryu Doo-ri is a blogger. They simply chose to live together instead of getting married, and have been sharing an apartment for two years.

Room 610: Jung Young-joon and Choi Ji-nyeo are a couple that's twelve years apart in age. Ji-nyeo has the personality of a penny-pinching ajumma and basically supports her younger boyfriend in the hope that he will someday realize his dream, while Young-joon is an unemployed musician who carries around a guitar he doesn't know how to play. They've been dating for two years, living together for a year, and are quick to fight and make up.

Room 510: Park Hwan-jong and Ha Seol-eun are in their twenties and have just moved in together. Seol-eun wants her boyfriend to believe that she's the perfect embodiment of femininity, and works tirelessly to keep up the illusion.

Room 709: Lee Joon-jae is a loner who prefers to stay at home, but is forced to find a roommate for financial reasons. He doesn't even want to exchange unnecessary small talk so he advertises for a foreigner who can't speak Korean very well. Enter Takuya, a Japanese guy on his travels. Takuya thinks Joon-jae is wasting his youth, and begins to draw him out into the world. (Signs of a BL relationship but pretty much no romantic development, lots of teasing though)

One More Happy Ending

My Mr. Mermaid (has 36 episodes but they're only 45 minutes, so total it's probably about the same length-wise)

The Heirs

Dream High

Shopping King Louis (kind of)

Suspicious Partners |

• Noh Ji Wook - Eun Bong Hee
• Ji Eun Hyuk  - Cha Yoo Jung

Are You Human Too? 

• Android Nam Shin - Kang So Bong
• Laura Oh - David
  
• Seo Ye Na - Nam Shin

Cheese in the Trap

• Hong Seol - Yoo Jung
• Kwon Eun Taek - Jang Bo Ra
• Baek In Ha - Guy with glasses (can't recall his name)

Goblin

• Kim Shin / Goblin - Ji Eun Tak
• Grim Reaper - Sunny

It's Okay that's Love

• Jang Jae Yeol - Ji Hae Soo
• Park Soo Kwang - Oh So Nyeo

Miss Hammurabi

• Judge Park - Judge Im
• Lee Do Yeon - Min Yong Joon

Just Between Lovers

• Lee Kang Doo - Ha Moon So
  
• Kim Wan Jin - Jin Young