The beloved group I.O.I gave fans a heartwarming surprise as they reunited for a cozy year-end gathering.

After debuting in 2016 through the Mnet survival show 'Produce 101,' the group received much love, but as a project group, I.O.I disbanded just a year later. Despite the short promotion period, I.O.I gained much popularity and the members continued to share their friendship, sharing snapshots of their time together on social media.

The girls shared photos of themselves enjoying their time together, sharing food and drinks, and taking photobooth pictures together. While some members couldn't make it to the gathering, the remaining members showed their affection by including them by holding up photos of them during the photo booth picture taking.

Fans love that I.O.I members continued to stay connected and maintained their friendship over the years. They commented:

"It's so good to see them stay close still."

"When will they come back?"

"I can see that I.O.I members are really close with one another."

"They're all so pretty."

"If it's hard to have a performance, they should at least do a live streaming."

"Kim Se Jung is so gorgeous."

"It's so good to see them."

"I can't believe it's already their 10th anniversary next year."

"I'm so happy they're still close to each other."

"They still share a bond which is so good to see."

"I miss them so much."

SEE ALSO: "I actually blocked him" Melomance duo open up about their past feud