SEE ALSO: Stray Kids unveil teaser for 'HALLUCINATION'

Stray Kids will be making their debut with their 1st mini album 'I am NOT' on March 26 along with title track "District 9". Before the big release, however, the boys were expected hold a showcase on March 25 in front of 3,000 fans. Tickets sold out the moment they were on sale. 

As a result, JYP Entertainment has decided to let fans purchase more seats by opening up for extra tickets. They said, "Please consider the fact that the additional seats will be placed in the side areas of the stages and hence, the angles might make the experience uncomfortable. Please purchase the extra tickets with this in mind."

The extra tickets will go up for sale starting March 19 at 8 PM KST through Interpark.