The ninth commission from ProfessorMegaman, and the first to feature Bianca, lol. :P
Long story short, they're on Earth, like in the early 2300s, not their usual homeworld. It's best explained that it's related to my 'project' I've mentioned a few times in past pictures like these.
And yes, they are riding on the bikes from Mega Man X2. And no, this is not a competition involving the original main character of DQ5, it's just a joyride that got turned into a race by good ol' Debora's competitive nature. XD