SHINee's Onew has kicked off promotions ahead of his single album "Chakgak (Illusion)." On the 12th, Onew released the album's promotion schedule on his official social media. Designed like a classified document, it shows Onew's photo along with clues connected by red string. According to the schedule, he will unveil a draft image on the 13th, followed by a music video spoiler, music video teaser, lyric poster and concept photos in three versions. A previously released spoiler photo featured the question "IS IT?" leading to the answer "IT IS." along with a mysterious silhouette. "Chakgak" is a single album that turns into music the emotions arising from differences in interpretation, as people perceive the same things and experiences differently. It contains three songs — the title track "Chakgak," "Mind Games" and "Tic Tac Toe" — and will be released at 6 p.m. on the 20th.