Talk:Monster Musume: Everyday Life with Monster Girls Online/@comment-25944684-20151230094338/@comment-25196231-20151230125236

Yes, it is the only way to get extra shopping groups. It's also worth the Ruby, cause when you complete your one time quests to the 700th and 1000th time, you'll get 10 rubies and 20 rubies respectively for each category of "once" mission/quest.