The Pro Dieter Dangchan, who was taking on extreme fasting challenges, suddenly falls into a fantasy world. This world is ruled by the villainous 'Akdangdang' of the Sweet Kingdom, who aims to trap and corrupt real -world pro dieters in his fantasy world. The appearance of the Sweet Kingdom is extremely fantastical, and the monsters living there are also very attractive. Will Dangchan be able to resist all these temptations and return to reality?