Nagisa is a young boy who has a crush on Hanon. Ever since retrieving a music sheet for Hanon, he has been trying to woo her. Unfortunately for him, the sheet music is of the tune Tarou Mitsuki dedicated to Hanon, which only reminds her of her fixation on the much more refined and older man.
In the manga, he says that he is two years younger than Hanon, which in addition to her still being fixated on Tarou, makes things more complicated for Nagisa.
