BoA, the pioneer of the K-POP boom, recalls her busy schedule when she entered Japan on the program, saying, "It was enough to digest two passports in a year."

Female solo singer BoA explained the hot popularity at the time of entering Japan.

KBS 2TV's music variety show "Immortal masterpiece 2", which was broadcast in South Korea on the 5th, featured BoA.

The first challenger was the band "Romantic Punch" who prepared "Valenti". Singer BEN, who saw the stage of "Romantic Punch", admired "It's a terrifying team." The facilitator, Kim Shin-Young, said, "I've done a good job on a difficult bar." The main character of the second stage was singer Kim Young-hum. Kim Young-hum chose "No.1". I arranged the original dance number into rock and reinterpreted it with my own excellent vocals.

BoA became very popular in Japan with "No.1". BoA said of the popularity at the time, "One passport wasn't enough. I had to get an immigration stamp, so I spent two books a year going back and forth and crazy about it." She revealed that the hardest part was living alone without her family and taking an airplane. BoA mentioned the fact that she won the youngest grand prize at the year-end award ceremony at the age of 17, "these memories were the driving force that made music more enjoyable."

BoA praised Kim Young-Hum's stage, saying, "There are magazine lyrics and expressions in 'No. 1', but Kim Young-Hum expressed that well." Regarding "Romantic Punch," she said, "It was like watching a musical scene on a TV Series tic. I enjoyed watching it." The judge's choice was "Romantic Punch".