The boys of MCND have unveiled a charismatic set of unit teaser images for their 3rd mini album, 'The Earth: Secret Mission Chapter. 1'.

MCND, who garnered attention for their debut 'Age' trilogy which kicked off with 'Into the Ice Age', plan to introduce a new storyline with their comeback series, 'The Earth: Secret Mission'. Fans can look forward to fulfilling a variety of "secret missions" with the members of MCND throughout their new story, starting with 'Chapter. 1' out this August 31 at 6 PM KST. 

In the meantime, check out MCND's latest set of unit concept photos, below.