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It has been ten years since DinDin’s debut. DinDin invites his friends and throws a party. Won Hee, Jong Min, and Jin Hyuk go to Yoon Min Soo’s studio and get a singing lesson. After getting Min Soo’s lesson, Won Hee records a song for the first time. Meanwhile, Jae Hoon, Sang Min, and Joon Ho go to a special place to get help to quit smoking.