This article is part of our coverage of Kim Soo Hyun And Kim Sae Ron’s Relationship. You can read more and view the entire timeline here.
Garo Sero Institute recently leaked a romantic postcard that Kim Soo Hyun allegedly sent to late actress Kim Sae Ron as proof of their 6-year-long relationship. Recent evidence that stemmed from the postcard caught by netizens further confirms that the actor did indeed send the postcard.
Kim Soo Hyun had allegedly written and sent the postcard from Paris back in 2019.
Saero-Nero (nickname), I had a drink in Paris. There’s no souvenirs today, so I bought a postcard and took hold of a pen, becoming a person who nags. I love you, Saero-Nero. You make me so proud Saero-Nero, you’re so amazing. I’ll be sorry to you every day.
2019.11.1
YouTuber Kim Paris
— Kim Soo Hyun
Soon after the postcard leaked online, netizens noticed that both nicknames used by Kim Soo Hyun to hide their real names had been mentioned by the two stars before.
Kim Sae Ron herself used the nickname “Saero-Nero” on an X (formerly Twitter) post dating back to 2016. The actress shared a simple picture of herself with the caption “SaeroNero.” She was 16 years old at the time.
Meanwhile, Kim Soo Hyun is often seen singing his messages in the same way he does in the postcard. Often times when talking to fans on Bubble he signs off as “Kim [place]” or “Kim [thing].”
Kim Soo Hyun: “Kim Will-Be-Back…”
Kim Soo Hyun: “Hello, nice to meet you. Today… I’m greeting you from the filming set.”
Kim Soo Hyun: “Kim Waiting-Ping…“
Kim Soo Hyun: “Ahahahahahahahaha”
Kim Soo Hyun: “Hello, this is Kim Hamheung-Chasa greeting you.”
Kim Soo Hyun: “It’s summer… Is everyone staying healthy?”
In his postcard to Kim Sae Ron, he signed off as “Youtuber Kim Paris” while on a Paris trip. On a Bubble message sent to fans while in Milan, he signed off as “Kim Milano.”
Kim Soo Hyun: “Good morning.”
Kim Soo Hyun: “Hello, this is Kim Just-Got-Back-From-Milano.”
This additional proof has gone viral on X and on TheQoo with netizens now more than convinced the romantic postcard is definitive proof that goes against Kim Soo Hyun’s consistent denial of his relationship with Kim Sae Ron.
버블에서도 맨날 김xx으로 자기이름 셀프네이밍햇엇는데
편지에도 김파리 ㅇㅈㄹ ㅅㅂ
이건뭐 빠져나갈구멍도없이 빼박임 아저능통와 pic.twitter.com/gqZ2k10tvL— 주민 (@tkadong) March 12, 2025
Even on Bubble, he kept self-naming himself as Kim XX all the time. And in his postcard, he even wrote “Kim Paris”… WTF. There’s no way out of this one. It’s undeniable. Ugh, I’m disgusted by how stupid he is.
— @tkadong via X (formerly known as Twitter)
Meanwhile, Garo Sero Institute also released damning photos Kim Soo Hyun allegedly sent to Kim Sae Ron when he was enlisted in the military, one of which includes Kim Soo Hyun kissing the actress on the cheek.
Damning Photos Kim Soo Hyun Sent To Kim Sae Ron 7+ Years Ago Exposed
You can read more about the accusations Kim Soo Hyun is facing from Kim Sae Ron’s family below.
Kim Sae Ron’s Aunt Alleges Actor Kim Soo Hyun Dated The Late Actress Since She Was 15, Blames Him For Her Death In A Damning Exposé