DEEP SNOW

 is the fourth single by DIANNA☆SWEET. It was released on January 21, 2015, and peaked at #15 on the Oricon singles chart.

Type A CD

 * 1) DEEP SNOW
 * 2) The twin tail!
 * 3) Hatsukoi Revolution 2015 (初恋Revolution 2015)

Type B CD

 * 1) DEEP SNOW
 * 2) LUCIFER
 * 3) Hatsukoi Revolution 2015 (初恋Revolution 2015)

Type C CD

 * 1) DEEP SNOW
 * 2) Always
 * 3) Hatsukoi Revolution 2015 (初恋Revolution 2015)