In contrast to the edgy, rock-influenced feel of "Twins (Knock Out)", "Miracle" is a light bubblegum pop love song with light-hearted dance choreography.

The follow-up single, "Miracle", is a typical K-pop bubblegum pop song, a genre still very welcomed by children and young adults.

However, fast, rap-influenced dance tracks like "Twins (Knock Out)", "Over", "L.O.V.E", and "Keep in Touch" have negative connotations about love and relationships.

Likewise, Super Junior's debut track "Twins (Knock Out)" speaks of self-deception and the indecisive aspects of a man's mind, contrasting the feelings between a man towards love and how he has to decide whether or not he should continue to love or fight with sticking to his own destiny.

Later in the same month, Super Junior collaborated with TVXQ and debuted at #1 on MIAK K-pop, selling 49,945 copies.

When it was released in Taiwan on February 16, 2006, it debuted on the G-Music J-pop Weekly Album Chart at number 16.