I mean, with Mochi Au Lait it isn't exactly uncommon... How many times have they paired sisters together now?
Well, let's see, this series alone is based upon four daughters (paired off into an older and younger wincest pairs) of a hotel matron (who is also in a yuri relationship with her sister), and there's also the other major series Mochi is doing that's explicitly about sisters dating... so frankly, if you see the word "sister" in a Mochi manga, you might as well substitute in "lesbian lover" right there.
Whoa!Whoawhoawhoa!I'm looking for someone.2 or 3 days?Why?Could you pay for my lodging here for 2 or 3 days?I was telling the truth when I said I don't have money.