Nariyuki Yuiga comes from an impoverished family, so he's eager to secure a full scholarship to college before he graduates high school. His principal agrees, with one stipulation--he must tutor three of the most talented girls at school and make sure they get into their target colleges!

Rizu and Nariyuki are now university students. Though some time has passed since graduation, not much has changed in their relationship. But things are about to get interesting with a little help from their friend Sawako and a mischievous ghost!