Moon Crystal

"Cottage Industry (가내수공업 (家內手工業))" (also known as D.I.Y.) is the first mini album by duo M&D (also known as Kim Heechul & Kim Jungmo), released by SM Entertainment on April 20, 2015. This is the duo's comeback after a 3-year and 10-month hiatus following their debut single "Close Ur Mouth". The mini album consists of six tracks written by Heechul and composed by Jungmo.