Yeri of Red Velvet was joined by her friends Lee Na Eun and Kim Do Yeon - also called her 99-line friends.

The three of them were born in 1999, making them and called as same-aged friends or 99-liners. She introduced them and shared that Yeri and Naeun became friends first, and Naeun is already friends with Doyeon. She also said that Naeun seems like a cool kid.

Yeri and Doyeon have been in the same class together at School Performing Arts Seoul(SOPA). They were partners at first and eventually became closer as they graduated. Yeri is a massive fan of Doyeon, so Naeun introduced her to Yeri, as per Soompi.

Meanwhile, as APRIL has made their return, Naeun talked about their summer comeback and their special album "Hello Summer" and their pop track "Now or Never."

Doyeon is also getting ready for their upcoming web drama "Pop-Out Boy" – a popular web drama based and webtoon of the same name. A story a male protagonist who stepped into the real world There crossed their path with Han Sun Nyeo(played by Kim Do Yeon) as highschool student who happens to share face and name as the female protagonist of Chum Nam Wook.

When asked to pick Yeri's good points, Kim Doyeon said that she quickly became friends with her. Naeun answered after a moment of hesitation and said that Yeri's smile gives you energy.

Also, the girls talked about their ideal types for men. Naeun stated she likes it when they take care of children, adding that she recently found an ideal type. Kim Doyeon shared that she wants someone like her older brother who's really good at studying and an "intellectual" kind for Yeri.

Naeun and Doyeon talked about their school's first impressions. Doyeon came to her, bowed, and introduced herself as I.O.I's Kim Doyeon as if she was talking to a superior. Naeun is still Kim Doyeon's senior in terms of the entertainment industry even they are both at the same age.