Fantasy anime feature about a teenage boy who moves to Nagano with his crush, in order to fool her 90-year-old grandmother into thinking that she is engaged.
Kenji (voice of Ryunosuke Kamiki) is a shy eleventh-grade student when he is asked by the confident, older pupil Natsuki (voice of Nanami Sakuraba) to take a summer job at her home. Upon arriving, he is shocked to learn that the 'job' requires him to pose as Natsuki's fiance. Their 'romance' is interrupted, however, when Kenji receives a mysterious text message containing a mathematical problem. Being a maths whizzkid, Kenji can't resist solving it, but he soon realises disaster has struck - he has caused the seizure of a huge social networking site that is used by most of the world's businesses and services. It is now up to Kenji and his newly acquired family to put things right...
