Last week on January 9 KST, SF9 made their anticipated comeback with the release of their 12th mini-album 'THE PIECE OF9'.

According to the Hanteo chart, the album sold around 50,000 copies on its first day — the group's biggest first-day sales — and had over 40,000 on its seventh day on, totaling 179,666 cumulative album sales for its first week of release.

'THE PIECE OF9' has now become the boy group's highest-selling album in first-week sales, breaking the record previously set by 'RUMINATION', which sold over 165,000 copies on the first week of release.

Congratulations to SF9!