Fan & Star, a website that delivers idol ranking information, is holding a special event for Kim Kook Heon and Song Yuvin on April 3. It is a large-scale advertising project to celebrate the two, who will celebrate their birthdays on April 15 and April 28, respectively.

The project will be carried out in cooperation with fans who support the two members. The number of stars donated by fans (points collected from the site) determines their success. The more stars gather the more celebratory advertisements are placed in various places.

Once 20,000 stars are gathered, a congratulatory video will be shown on the CM board at Hapjeong Station in Mapo-gu, Seoul. If the number of stars reaches 45,000, a congratulatory video will also be sent to the SM board (wall) at Gangnam Station. In addition, super-special products such as Hongdae Station Multivision and Max Vision, Hongdae Station intersection large electronic display boards, Myeong-dong Media facade and Shinjuku electronic display boards in Tokyo, Japan are also available.

Attention is focusing on whether Kim Kook Heon and Song Yuvin's birthday projects will be successful for the rest of the year, with their birthday projects running until April 5 and April 19, respectively.

Meanwhile, "Fan & Star" opened B.O.Y.'s mini-concert cheering project on Nov. 29 last year. With the participation of many fans, 245,598 stars gathered. At that time, cheering videos were shown at various locations at Seoul subway stations in line with B.O.Y.'s mini concert schedule.