The 2nd ever actor group to debut under Fantagio, SURPRISE U consists of Kim Hyun Seo, Yoon Jung Hyuk, Eun Hae Sung, Ji Gun Woo, and Cha In Ha. Their 1st mini album contains 4 songs total, including the title track, also called "I Do".�

Meanwhile, the final episode of SURPRISE U's debut web drama 'Idol Fever', known for starring Weki Meki's Choi Yoo Jung and Kim Do Yeon in addition to cameo appearances by numerous Fantagio artists like 5urprise and Ong Sung Woo, airs its final episode on July 17.�