As two of the most highly acclaimed vocalists in K-pop, when the duet “Heart On The Window” by Jin and Wendy was released, it received enthusiastic support from fans. It also marked the beginning of their friendship.

It is worth remembering that Jin once shared how they connected through a mutual friend: “I was having a meal with a friend and said, ‘I want to do a duet with Wendy.’ My friend knew her number, so I asked them to call. When Wendy answered, I said, ‘Hello, Wendy, this is Jin. Do you know me?’ She said, ‘Yes.’ I asked if she would do a duet with me, and she said, ‘That sounds great,’ so it all worked out easily.”

Meanwhile, Wendy has repeatedly expressed her joy about collaborating with her senior: “I really enjoyed it. I loved the song when I first heard it. Recording it was a great experience. I’m honored to be part of Happy’s album,” and she also sent her thanks to Jin.

One very adorable thing about their friendship is that even though their collaboration project was a while ago, they have continued to support each other’s work. While Wendy appeared several times, performing “Heart On The Window” live with Jin in front of ARMYs at his fan meeting and solo concert in кσяєα, Jin also visited Wendy’s radio show to promote his new project.

In particular, there was soмєтнing behind Jin’s action that deeply moved Wendy — and she only recently shared this detail when appearing on SBS PowerFM’s “2 O’Clock Escape Cultwo Show” aired on the 9th of this month.

During one segment of the show, when the host asked about Jin’s appearance on Wendy’s Youngstreet Radio last May — which became a hot topic — the female idol recalled: “Jin made a promise to keep his loyalty. He promised that if he ever appeared on a radio show, he would appear on mine. Since I participated in a song as a featuring artist, he said he would definitely come.”

But what was more remarkable was that Jin didn’t just keep his word — he took the initiative to fulfill it, showing that he truly acted out of sincerity and kindness toward his friends. Wendy was touched by this and said: “He told his company in advance and had them put it into his schedule. Before I could even ask, they said, ‘Wendy-ssi, he has decided to appear.’ I was so thankful.”

Wendy’s story resonated with many fans. Returning favors or helping colleagues is common in every field, not just among idols — but Jin showed a level of thoughtfulness and warmth that went beyond a simple gesture of gratitude.

His attitude makes others feel genuinely valued, and in return, they hold great affection for him. That is why everyone who has ever worked or interacted with the BTS superstar can’t help but praise his golden personality.

Another female idol who once collaborated with Choi Yena also shared what it was like to receive “the world-clαѕѕ treatment” from Jin. She was invited to perform at his concert and recalled: “Even though it was just for breakfast, they grilled thinly sliced pork belly samgyeopsal so deliciously. I could also freely choose whichever Jin Ramen flavor I wanted — whether mild or spicy. I have such an intensely vivid memory of how delicious they were,” along with many other details she couldn’t fit into the broadcast.

Stories like these further highlight Jin’s attitude toward his friends and colleagues. Fans couldn’t be prouder of Worldwide Handsome Jin:

- I remember Wendy saying in some interview she feels kinda awkward asking for favors from others to not be a burden but she will willingly do favors for others without hesitation. I’m glad Jin & Wendy match each other’s energy. It’s so nice when givers meet other givers too

- Ahh this man is raising my standards again.. and the way He decides, company follows, so himmm

- Jin is really loyal. He always keeps his words

- Seokjin is the biggest green flag ever to exist. Considerate, attentive, empathetic, loyal gentleman

- reminds me of when seokjin gave yena a whole carton of jin ramen because it was her favourite ramen brand, he is always so considerate about the people he works with

- An angel met another angel! My dear Jinnie and dear Wannie, please cooperate more often if you have the chance! HOTW is truly a treasure! May friendship last forever, my dear Wenjin babies!

- He told them in advance HES SO KIND. 

- When a man truly values human relationships whether it’s friendship or professional collaboration his actions aren’t just out of courtesy, but stem from a genuine sense of commitment and gratitude.

- That could tell you alot about seokjin n how he always appreciates pple worked with him so polite so humble