This is one of my favs on this site, next to Nishi Uko's works. Even though story is placed in high school, it's not cliche (I hate this word) at all - idea with table notes is just great! Pacing is great - relationship between Kana and Rise and it's development feels very natural and soooo heart-warming. And art style.. It's wonderful. Just look how gorgeous Kana looks on some panels!
Love it.