+ Imoutos!
+ Absolutely cute and pink art, makes me feel like a cream puff if you know what I mean...
+ Miyabi is cute! x3
+ Funny and cute episodes, like when they're at the ball or amusement park
+ It surprises the viewer couple of times
+/- Old (good?) character types, a good girl, tsundere, a rich girl, a genki and clumsy girl and a cosplay girl
- It doesn't take "can't sister and brother be lovers?" -theme to any deeper reflection.
- Too many pointless fanservice and naugty jokes
- Homophopic moments and jokes
- The mystery is kind of boring
- Like usual, the main guy doesn't have any personality
- The plot is forseeable after all.