SEE ALSO: HyunA faces backlash for talking candidly about her boyfriend Junhyung on 'Jo Hyun Ah's Thursday Night'

The second teaser gives us a clue at what is exactly driving these boys 'crazy' as it follows the activities of the female lead.

This song, which will be be of a retro feel with acoustic guitar and brass sounds, is the work of producing team One Punch.

So without further ado, check out the teaser above for "Crazy", which will serve as a pre-release for a mini album to come later!�