This is an authentic Not For Sale (NFS) signed promo album of XIKERS – House of Tricky: Doorbell Ringing.
 
The album was purchased in South Korea via Junggonara, one of the country’s largest and most active peer-to-peer marketplaces, alongside Bunjang. Junggonara is widely used by Korean collectors and fans, making it a common source for genuine promo and industry-distributed albums.
 
A unique feature of this album is a handwritten message inside that carries a nuanced reference believed to point to Mingi of ATEEZ (KQ Entertainment). While not officially documented, the wording and context strongly suggest an internal or personal association, adding to the album’s collectible significance—especially given XIKERS and ATEEZ share the same agency, KQ Entertainment.
 
As a Not For Sale promo album, this item was not commercially distributed, making it significantly rarer than standard retail releases. Ideal for serious K-pop collectors seeking authentic, agency-linked signed memorabilia.