Has anyone worked with MTK International Inc through Hello-Sensei?

Just as the title states, I'm curious if anyone accepted a contract from MTK International Inc. on Hello-Sensei. Recently was presented with a lesson one day a week in the evening supposedly at the student's residence and the company seemed rather pressed to find someone for that position. They asked for my zairyu card and asked me to start immediately, but haven't requested my banking information or my address despite saying they pay by check. After I said I can start, they haven't been swift with a response in regards to those inquiries. Not really sure if I want to go if I haven't secured the fact that they will actually be paying me.

So I guess my question is if they are legit. It's an easy source for pocket money and no big deal to go, but I'm having second thoughts about going through a company just for a couple hours a week. But maybe this is how Hello-Sensei works?