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When Go Mi Nam is sent to the United States for corrective eye surgery, Manager Ma begs Go Mi Nyeo to dress as a boy and take her brother's place.

After a drunken accident, Mi Nyeo has to tread carefully around Tae Kyung, who doesn't trust her at all.

Having found out her true identity, Tae Kyung wants to kick Mi Nyeo out of the group, but she insists on staying until she finds her mother.

The band prepares for a performance at the music festival, where they meet Tae Kyung's mother and Yoo He Yi, a singer-actress with a fake personality.

Mi Nyeo spends time bonding with Shin Woo and Tae Kyung; her aunt's arrival forces Mi Nyeo and Tae Kyung to make a difficult decision.

Mi Nyeo is unsettled after one night in Tae Kyung's room; He Yi finds out Mi Nyeo's secret and uses it to bribe Tae Kyung into being her boyfriend.