On March 13th, Kwon So-hyun of 4minute updated her Twitter to notify the fans that it was the 1000th day since 4minute's debut.

Kwon So-hyun's Tweet read, "Debut 1000th-day anniversary Ji-So couple" and uploaded three photos to go along with her post. The photos showed Nam Ji-hyun and Kwon So-hyun. The Ji-So couple was a short version of Ji-hyun – So-hyun Couple.

In one of the photos, she has her eyes closed while making a happy face expression. Kwon So-hyun made the fans' hearts beat with her adorable smile and face expressions. Kwon So-hyun's flawless skin also received a lot of attention from netizens.

Netizens who saw Kwon So0hyun's Twitter post regarding the anniversary responded with comments like, "Congratulations on the 1000th day!", "Already 1000th day? Wow! Cheers to 4minute", "Nam Ji-hyun and Kwon So-hyun. Cuties" and etc.