Yonghwa and Seohyun need to make a special performance together in a concert on a "special day". But at the same time Seohyun angry with Yonghwa for not contacting her for 1 month because he was trying to use the "pushing and pulling method". Victoria went to Busan to watch 2PM concert. They both end up jealous about something (Nichkhun about Chansung, and Victoria about his racy performance). Gain decides to celebrate Jo Kwon's birthday in her special and cute way and distracts him with kimbap.
