Nazotoki and Nazokake are Hinata Haruhana's biggest hits. On February 19th she uploaded the song Nazotoki, with her as the vocal. A month after, Hinata Haruhana uploaded the 'Vocaloid' version sung by Kagamine Len. A year later, the series was sold on an album called Mechanical Mystery. Hinata Haruhana has stated that all of her songs are connected to each other in some way. The only confirmed songs to be related are Nazotoki and Nazokake.