Heartwarming / With the Light

  • Hikaru saying "Mommy" for the first time.
  • When Masato is transfered to a job where he was basically waiting to be fired, but used his extra time to help disabled children (specifically autistic kids) because he wants to make Hikaru's life easier. D'awwwwwwwww.
  • Aoki-sensei's wedding most definitely counts: Aoki himself was reduced to tears when his students performed the Mouse March. Then, he joined them.
  • Kanon standing up to the kids who make fun of her and Hikaru. A true sibling standing up for her brother.
  • When Hikaru saw his mother crying after realizing he will not be 'normal', he gave Sachiko a few wildflowers that snapped her out of her despair.
http://tvtropes.org/pmwiki/pmwiki.php/Heartwarming/WithTheLight