16-year-old super-studier Nagi Umino, second-year student at the Megurogawa Academy high school, was switched at birth. On his way to a dinner to meet his birth parents, he accidentally meets the brash, outspoken, Erika Amano, who is determined to make Nagi her fake boyfriend as she never wants to actually marry. But once Nagi makes it to dinner, he finds his parents have decided to resolve the hospital switch by conveniently having him marry the daughter his birth parents raised…who turns out to be none other than Erika herself!
Erika has come to Hakone! To earn money for Sachi’s school fees, Nagi and Erika are living and working at the Nebula Villa, a traditional Japanese inn. How will they fare as they take on this formidable hotel service job? And who’s the mysterious visitor that will shake both their destinies?!