[7] However, on January 8, 2018, Soojin withdrew from the show following injury from a traffic accident and had received emergency surgery.

[19] The group sang KakaoTV variety show Wannabe Ryan's signal song "Boom Chi Ki" (붐 치키).

[27] A image teaser posted on the group's social media accounts announced their third mini album, We Play, would be released on March 17.

[29] On May 28,The group released a single "7Days Tension", in collaboration with South Korean eyewear brand Davich.

[30] On July 13, Play M Entertainment confirmed Weeekly was preparing for a comeback, aiming for an early August release.

[31] On July 15, an image teaser posted across the group's social medias announced their fourth mini album, titled Play Game: Holiday, would be released on August 4.

[32] On August 1, PlayM Entertainment released a statement announcing that Jiyoon would be going on hiatus temporarily from all activities due to reoccurring stress and anxiety.

[37] On February 28, it was announced that Shin Jiyoon will not be participating in the album's promotions due to focusing on treatment and recovery for her anxiety.

[48] On July 9, the group made their comeback with the release of the sixth EP Bliss, along with its lead single "Lights On".

[49] On May 11, 2021, Weeekly was selected as the advertising model for Korean eyewear brand Davich Optical Chain's Tension 7-Day Lens contact lenses.

[50] In August, Soojin was selected as the ambassador for the 23rd Bucheon International Animation Festival (BIAF2021) that was held from October 22 to 26.

[51] In August 2022, Weeekly collaborated with AliMoli Studio for an XR Animation Game Astrostation that is planned for release.