Koe no Katachi, Boku dake ga Inai Machi Recommendations
Well, those two shows doesn't look the same for the scenario but have some similar points.
1- Those two shows speak about child harassment. The main character will try to save or to redeem himself from the other main character, the girl.
2- The atmosphere is oftenly sad but got some funny moments. In those two shows, the main character got a good friend who'll be helpfull (Nagatsuka and Kenya).
3- Minor characters look pretty similar, for exemple: the mother is there without her husband and try to help her son.