Nanako is a cute and cheerful high school girl with one peculiar trait—instead of verbal communication, she writes senryuu (a type of haiku) poems to relay her thoughts.

Nanako is a kind, caring, cheerful and outgoing girl who always wears her heart on her sleeve, which often causes her to slip out some of her feelings (through senryuu) for Eiji Busujima and leave both of them in an awkward situation.