Amusing! Kasuga Haru is the fresh recruit to an esteemed group called the Princess Guard, who directly shield the royal princess of Hinomoto Kingdom. Despite this honor, there's a catch. The "royal princess" is a hikikomori, a hermit who surrounds herself with video games and refuses to step outside her room. The Queen assigns Kasuga with a special task - to transform Princess Terras into a refined individual. Will Kasuga triumph in converting this otaku princess into a graceful and attractive royalty?