Inubou Takeru has transferred to an all-succubus school, where he holds the position of goodwill ambassador. With school out for summer, he'll be spending even more time with the girls, including a trip to the seaside! With activities ranging from shameless oil massages to a succubus swimsuit contest, Inubou is having the best summer ever! But Class President Megumi is looking very depressed. Something strange is going on! Can Inubou figure out what's wrong and save summer for his sexy friend?