Does anyone know what that kanji in the fourth line is? I can't seem to be able to even recognize any radicals inside it, so looking it up is sort of impossible for me.

4th line from left or right ? if in japanese reading order it would be 断る if in "western" it would be a simplification for handwriting 魔　广+マ　(http://en.wikipedia.org/wiki/Ryakuji) the first sing in Marisas name

interesting, you can replace marisa with rinnosuke in the text and it still makes sense.