Hehe, there are more characters for you to discover in the manga =3 On Mangafox they upload a new chapter ever week, whenever the author publishes, at least. And yah, Kassim's death was saddening. 

I've already seen "Hotarubi no Mori E" XD It was such a sad tale. I shed some tears at the end. Have you seen "Kotonoha no Niwa" ("The Garden of Words")? It's also a wonderful love story movie I would recommend to anyone who likes slice-of-life.