This was such a cute chapter! Otone spoiling the older girl in the bath and then bed was adorable. And hiding her hickey from mom and dad!? What a little minx!
I like how it's been hinted at that Onee-san is a little on the unstable side, but it's never said outright. Just throwaway comments here and there that imply she's got some real issues. I wonder how poorly she'll react if/when they're found out, and she's prevented from seeing Otone?
And d'awwww! Thanks for the tag! I'm happy I was able to help! This series is too precious not to!