2AM has just revealed the second concept teaser for their first official album, "Saint O'Clock", through a rather surprising way. Plastered on the wall of a Seoul subway station was a large-scale poster of the boys in crisp white suits with black accessories. The size of the poster is said to be equivalent to the actual heights of the boys themselves. Fans that noticed the poster immediately began commenting, "Is this another concept for their official album?" and "I will definitely use the subway once 2AM maekes their comeback." It was later revealed that the poster shown is the actual jacket photo for the standard edition of their album. 2AM, being the promotional ambassadors for Seoul Metro, decided to use the opportunity to promote their album to a wider audience. 2AM's agency, Big Hit Entertainment, stated, "The subway posters are just the start of our large-scale promotions for 2AM's comeback. We'll be working hard to make sure the album is accessible to everyone." The album will be released on October 26th. Source + Photos: Osen, Newsen