At least, Chiga's chara design is different from what you usually see, and I actually quite like it. Plus, the SD faces are great. ^^
You can download it here or here. (Thanks for the link and the upload to MU, absolute_enigma!)
Also, Ryuu-Rogue has just released the second OVA of Switch after more than a year. *celebrates*
The plot is awesome, and very slashable! ^__^ Though we don't get any answers about the characters here, I suppose they're all in the manga.
You can download it here as part of a batch. (Thanks to castor for this link!)