
I.O.I concluded their 10th debut anniversary reunion with an emotional broadcast on June 5, performing new music and revisiting memories that left members in tears. The appearance on KBS 2TV's "The Seasons - Sung Si-kyung's Eardrum Boyfriend" marked the group's final domestic television activity after reuniting for the first time in nine years.
Formed through Mnet's "Produce 101" in 2016, I.O.I was a project group that operated for only eight months before disbanding, with members pursuing solo careers as singers and actors. For their 10th anniversary, nine of the original 11 members reunited — Im Nayoung, Chungha, Kim Sejeong, Jung Chaeyeon, Kim Sohye, Yoo Yeonjung, Choi Yoojung, Kim Doyeon, and Jeon Somi — while Zhu Jieqiong (active in China) and Kang Mina (focusing on acting) supported from afar.
The reunion gave fans a rare chance to see the group together after nearly a decade, with new song "Suddenly" topping Melon's TOP100 chart.
"My younger sisters, a lot of time has really passed. But you are still so pretty. Even though we are all busy with our own lives and can't contact each other often, I hope our friendship never changes. If you watch this video now, I really want to tell you that our youth together was so beautiful. I was happy being with you, and I love you so much." — Im Nayoung