Step 2/4 (stylized as step 2/4) is the debut solo extended play (EP) by South Korean singer and actress Gain, a member from girl group Brown Eyed Girls. With the help of executive producer Jo Yeong-cheol and Lee Min-soo, the album was created with a sexy, spirited, striking and mature theme. It was released on October 8, 2010 and distributed by both Nega Network and LOEN Entertainment.