[INS-mode] Risou no Imouto 2

More ideal little sister for all of you. Third part is already being worked on AND a little bird told me there’s 4th part that showed up on C91, so… Also, I decided to go with “Ideal” for title, I have no idea why I ended up with what I got for the first part.
Actually, I already received a few orders for C91 stuff, though they’re not yet scanned.
Courtesy of Peganuss.