STORY1: "Hikaru stands at a loss in a handicraft shop"

Wow, Look, Hikaru! This car is cool, isn't it? It runs very fast.

It looks cool. Can you show me how it runs?

OK. What's wrong? It can't move. It moved before, but now there's something wrong with it. Hikaru, please try to check it.

I'll try to look at it. This wire has opend. That's what is causing the problem.

Please fix it, Hikaru.

I can't fix it.

Hikaru! Fix it by soldering.

Soldering？

-Hikaru goes to a handicraft shop to buy soldering goods.-

There are so many types of soldering iron.
Nichrome heater or ceramic heater?
I'm not sure which type of soldering iron I should buy.

-While Hikaru is standing at a loss in front of the soldering iron counter,
Mr. Fusamura appears.-