BTOB�made a hot transformation for their 3rd mini-album 'Thriller' and released the making-of for their album jacket, which luckily for you, features a lot of shirtless scenes!

The members give a close-up of their abs and tattoos, sing a cappella, work out�in between takes, and give their all through the pouring rain on set. Although the boys are blazing with charisma in their album jacket, fans were able to catch their cute charms behind-the-scenes.

Enjoy the eye candy that BTOB brings in their jacket making-of film above!

SEE ALSO: BTOB brings 'thrills' with comeback MV