The second mini-album 'Green Green' by Cortis, which features their hit song 'Red Red,' has sold over 4 million copies.

Analysts suggest that the popularity of 'Red Red' naturally led to strong album sales.

According to the Circle Chart, Cortis's second mini-album 'Green Green' recorded a cumulative sales of 4.1 million copies.

This year, the only albums in South Korea to sell over 4 million copies are BTS's 'Arirang' and Cortis's 'Green Green.'

Their agency, Big Hit Music, analyzed that the title track 'Red Red' and b-side track 'Young Creator Crew' captivated listeners, and the interest in the songs naturally translated into album sales.

'Green Green' is also receiving significant attention overseas.

After debuting at No. 3 on the US Billboard main album chart, the Billboard 200, it ranked No. 188 this week, charting for 18 consecutive weeks.

(Source: Billboard)