Lee Joon-gi (Lee Yi Kyung), who invited his college classmates in the first season, this time extends his magic hand to his high school classmates. The words and deeds of the young people who are trying to save the B&B Waikiki, which is still unable to escape the crisis of bankruptcy, will bring about what excellent results, which has attracted attention. The first victim seduced by Lee Joon-gi is Cha Woo-sik (Kim Sun-ho). Woo-sik is a singer volunteer who used to be an "unknown idol" and is a unique "difficult man". He fell into Joon-gi's trap and invested all his property in Waikiki. Lee Yi Kyung, who was a funny machine in every episode in the first season, will continue to be the center of laughter in the second season. Although Lee Joon-gi (Lee Yi Kyung) saw the light for a while, he became a livelihood actor again. In order to rebuild Waikiki, he dragged everyone around him into the water, and there was no day of peace. Another victim deceived by Jun-ki's sweet talk, Guo Qifeng, is played by Shin Seung-soo. He was once a highly sought-after baseball genius, but now he can only play in the second-tier team. Qifeng's life has fallen into a trough because of his investment in Waikiki. Moon Ga-young plays Han Soo-yeon, the first love of the young people in Waikiki who loved "Houamdong Goddess" in those years. After Soo-yeon and Jun-ki reunited after being suddenly humiliated on the wedding day, they settled down in Waikiki by fate. Ahn So-hee plays Kim Jong-woon. She and Jun-ki both graduated from the Department of Drama and Film. She is a "working king" who works all over the world to make a living. She has a very unpretentious and outspoken personality. Kim Ye-won plays Cha Yu-ri, Cha Woo-sik's biological sister. She dreams of becoming the "second Baek Jong-won". Not only Woo-sik, but also Jun-ki and Qifeng are dispatched and ordered by her. She is the highest-ranked commander in Waikiki.