Jeon Somi appeared on MBC's 'Radio Star' and shared the process of I.O.I's reunion. The episode of 'Radio Star' aired on the 29th featured Lee Jong-hyuk, Yoo Sun, Jeon Somi, and Lee Dae-hwi.

On that day, Jeon Somi talked about preparing for I.O.I's comeback, saying, "We have completed the album jacket, music video shooting, and recording," and added, "We practice for 4 to 6 hours a day, just waiting to be unsealed." She also revealed that she was in charge of writing the lyrics for the title track, saying, "I am doing it with a grateful heart." She then premiered a verse from the new song "Suddenly" for the first time.

Jeon Somi introduced the song as "pretty and chic," explaining, "There were many concerns because our activities ended 10 years ago, so I.O.I didn't have a concept. After 10 years, it was too old to do it like 'Very Very Very.' After compromising, we decided to come back with a gentle song."

Regarding the background of I.O.I's reunion, she said, "We received so much love from a miraculous program 10 years ago," and added, "The reason we are gathering this time is because everyone wants to go back to that time and reminisce as if they are seeing the girls they liked back then. We tried to meet on the 5th and 7th anniversaries, but it didn't work out for various reasons. This time, we promised from the start. When practice schedules were set, we promised not to make personal plans and prioritize this. After all of us signed the contract, we visited the company."

About the person who led the reunion, Jeon Somi said, "It was Chungha unnie," and added, "We were summoned by unnie's call."