Welcome to Waikiki 2 is a dramedy about the youthful love and passion of the inhabitants of the Waikiki Guest House. Jun-ki's "evil influence" on his college classmates continues, this time towards his high school classmates. The crazy plan on the verge of bankrupting the Waikiki Guest House is still on track and antics ensue. Woo-sik, who used to be a member of a not-sofamous boy-band, falls into Jun-ki's spell and invests every penny he has into the guest house. Ki-bong, another victim of Jun-ki's sweet talking, used to be a famous baseball player but now he only warms the bench. He makes the wrong decision of investing in Waikiki and now he is about to go broke. Sooyeon is the first love of all the Waikiki partners but finds herself moving into Waikiki after tragically being stood up at the altar. Jeong-eun has done every part-time job out there and is a classmate of Jun-ki's film school. Yuri is Woosik's older sister who becomes the "Queen of Waikiki", as she bends Woo-sik, Jun-ki, and Ki-bong to her will.