Kasuga Hanari is a transfer student from Japan who speaks fluent English and Japanese. But her extreme intellect and drop-dead beauty means nothing to her when she's curled up in front of her computer playing osu! She evens goes to the principal with a campaign to start a club for her fellow osu! players. Ryan McKenzie is a typical student at Kingsglen Academy. On the final stretch of his high school career, he doesn't have time for playing "girly" games...at least, that's the front he puts up for his friends. He's a closet otaku and a hardcore osu! player, under the name, lastkING45. When Kasuga and Ryan meet on osu!, they become the most unlikely friends. Kasuga knows Ryan in real life too, but just doesn't know that lastkING45 and Ryan are the same person. Ryan knows who Kasuga is and wants to be more that just friends. When he asks to meet her in real life for the first time, Kasuga's world gets turned upside down.