I vote that the show title should be changed from My Little Sister Can't be this Cute. To My Little Sister Is A Giant *****. I can't Kirno in the slightest, she is an awful human being and her brother is a personality devoid blackhole with no life beyond interacting with his little sister or her friends.
I was traumatized by this shoe as well because I went in expecting a comedy with some incest-y bullshit, but instead got a horror story about a guy whose entire like was dictated by his ***** sister's whims. Not that his other romantic choices were any better. They were all awful characters or paper thin, but any of them would have been better than the raging ***** that is Kirno. And episode 14-15 were just plain awful of the second season gave no closure. After all that trouble he should have been like hey
. Then at least he would have been somewhat memorable.
But yeah if you think incest is yuck then stay away from this show, but if you can stomach incest portrayed in a realistic way that actually has some emotional weight behind it try Koi Kaze. Now that is a bitter sweet love story between siblings that actually deals with consequences of what they're doing. It's also just a much better story in general.