The first step to entering the research facility was to head to the bulletin board that was stationed in the middle of the strange settlement. As the girls walked over, Roy continued to follow them. He knew what they were planning to do, but thought that if he was going to live in the place anyway, then he needed to do one trial. So, he might as well have got it over and done with straight away.
Knowing full well though, that the girls would be up to something. He would follow them, but try his best not to get involved at the same time. On the bulletin board there were several different times mentioned that one could go to the research facility at, other than times though, there wasn't much else.
No information on what type of test they would be doing or anything about why they were doing it. Secretive as ever and most kingdoms would have banned an operation such as this one.