His character in My strange Hero and Vincenzo are really such depressing ones. His acting skills just make it greater. Even in It's okay to not be okay, why does he always have to have such a sad bg story?😭

I really love his character in vincenzo

He deserved to be in a lead role, His acting skills in Love in a Moonlight was really so good to think that he was only 19 at that time.

He's such a versatile actor...and so cute 🥰

Saw him first at my id is gangnam beauty I fell inlove in his character in Vincenzo 😍

Loved him in Vincenzo ❤❤👍😊

I can't wait for him to get another lead roll 동연아 화이팅!

whenever he smiles. me: wow he looks so cute and handsome. who are agree with me

Mr. versatile ❤️

I love his smile ❤

He is a very versatile actor, sincere and a good sense of humor. I will be chasing and support all his projects, about time for the big hit lead role.

One of my favorite actor / singer ❣️

Just love this kid.

I love his role in Vincenzo 👌💕

I'm in love with that man.

I loved him in Never Twice. He is a very versatile actor. I love his acting ❤️

I'm starting to admire him (kwak dong yeon) after watching his drama Vincenzo . ❤️

Love him!! Such a talented young actor 🥰🥰🥰🥰

Красавчик😍

I didn't know he was very young!!

My crush 😊😊, I loved him since Love in the moonlight. 🥰😘

Love him, his superrrrr talented

I miss Daniel the Onion ❤️😩✨🥺

i have seen him in its ok to not be ok and vincenzo ......he is sooo cute omg , his smile is just one of a kind sweet and pretty ! and whattttttt stop it !! he is like the same age as jungkook ??????? despite his older character portrayal i could tell he was younger but i thought he must be smthin like 28-29

he is really good in monstrous!

Me encanta su trabajo en amor bajo la luz de la luna

Good

I recommend everyone who haven’t watch never twice to watch it You will fall for him for sure but yoj will see how great he is ….

I knew kwak dong yeon first in love in the moonlight!😍😍😍he is the right hand of the king witch is bogummy😍and i already love him na!😁❤️kwak dong yeon is such a talent actor,I'm so impressed in what ever he portray in a series or movie😍from then i always watch his drama,he was totally great in Vincenzo❤️love his character on that😍a multi-faced kwak dong yeon😍❤️❤️❤️saranghae oppa🥰

He was also in my id is Gangnam beauty

my new oppa🥰

I love his smile 😍

He will be successful in his acting career...!!! He's a very versatile actor...!!!💞💞💞

Aq suka ny yg d film love in the moonlihgt...cakep benwr beyoung yoen😎

j'aime beaucoup kwak dong yeon c'est un bon acteur et il est tres beau

i love him ❤

He is 4 years older than me but he's so dam cute I even love his smile

I actually think he looks younger not older than his age

I will start to grow my onion too🥰🥰🌷🌷 Kwaw dongyeon

👍👍👍🌼🌺🌹💐💐

Who is here after watching big mouse??

My 19 year old daughter shares a birthday with him.

Kim Seong Cheol plss

Most people fall for him on Vincenzo, but me... I fall for him since I watch his drama in 2013 about coming-age love story.

He deserves better ending huaaaaa

Big mouse

남자답게 생겼는데 또 이쁘게 생김

Is he a brother with Kim Hyun joong??