This anime is about Komi, a girl who can't really communicate in a school full of strange people and there is no more plot, only joke, no charatere developpement, no fun, no enjoyment.
Komi don't talk, communicate with word write on some paper, when it appen something, Komi vibrate like a phone or a coffe machine but nothing more, she is everytime affraid by everything.
Komi is watchable only in 1.5x speed.
Really why this is a popular anime ?
Aharen-san who have a similar theme is much funnier, have better joke and charaters developpement, so don't loose your time with komi.
