The story revolves around doomed relationship between a teacher Koga Ikumi, who is dying of an inoperable brain tumor, and his 16-year-old student Hina.The story revolves around doomed relationship between a teacher Koga Ikumi, who is dying of an inoperable brain tumor, and his 16-year-old student Hina.The story revolves around doomed relationship between a teacher Koga Ikumi, who is dying of an inoperable brain tumor, and his 16-year-old student Hina.