Should I be happy?

I received a mysterious gift today.



It says there, "from:神戸市国民健康保険 (Kõbe-shi kokumin kenkõ hoken/ National Health Insurance, Kobe City). As far as I can remember, I didn't enter any competition or lucky draw for the last 6 months.

Full with curiosity, I open the package.



Hmmm...A box...

And it is a...(drum roll)



First aid kit?

Should I be happy? Should I?