I'm finishing Genki I. I was reading a tale about Orihime+Hikobushi and its ending confuses me. I don't get it how it gets from "they were allowed to meet each other once a year on 七月七日, so they met at that day so their wish came true" story jumps to "so these days we write our wishes on paper, because people say that on that night wishes come true."
Ehhm, what? Because kami allowed Orihme to have a gentle lazy love with Hikobosi on that day? It makes no sense.
For starters, Kami allowed the meeting before 7/7, so declaring wishes on 七夕の日 is a little too late.
Second, story mention no writing on paper at all. Orihime got 7/7 by being whiny pathethic bitch(kami-sama itself says so), not by writing funny characters on funny colored paper.
Third, I don't see connections between relationships of gods' daughters and good grades of children.
So the question どうして私たちは七夕の日にたんざくに願いを書きますか seems unanswerable. Or am I overthinking?