 If you liked
Canvas 2: Nijiiro no Sketch
|
 ...then you might like
Kono Naka ni Hitori, Imouto ga Iru!
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Both series contain a protagonist surrounded by many girls including one that is a sibling.
Both series contain comedy, drama, and romance.
Both also takes place in a school like setting.
Both series also has a mysterious like atmosphere that makes the viewers wonder what will happen next.