"Seo Ham, who is clearer than the sky in autumn, Happy 27th birthday."

Idol fandom playground "Fan & Star" opened a birthday project for the group's KNK Park Seo Ham on Sept. 20. It is a big advertising event for Park Seo Ham, which will celebrate his birthday on Oct. 28.

Park Seo Ham's birthday project is open to domestic and foreign fans. Success will be determined by the number of stars that fans donate to the project (the point that can be collected on the site), and if more than 50,000 stars are gathered, a congratulatory advertisement will be held.

If the number of stars reaches 50,000, a congratulatory video will be sent to the CM Board at Hapjeong Station, a subway station on Seoul's Subway Line 2. If you reach 100,000 stars, you will also see a congratulatory video on SM Board (wall) at Gangnam Station (Subway Line 2).

When the number of stars reaches 200,000, celebratory videos will also be shown on the electronic boards of the waiting rooms at 43 stations on Subway Line 2. Furthermore, various gifts such as the Apgujeong CGV screen, the Hongdae Station Multivision and the foreigner-only Treble Bus ad await fans.

Currently, Park Seo Ham's birthday project has a string of congratulatory messages from fans, including "Happy Birthday to our oldest son in KNK" and "Happy 27th birthday to Park So Hama, who is clearer than the sky in autumn."

With the event running through Oct. 6, attention is being paid to whether it will be successful for the rest of the year.

Meanwhile, "Fan & Star" is holding its first week of voting in October. The vote runs through Oct. 7, with any fan eligible to participate.