Sasami-san@Ganbaranai
For Sasami, life's tough as she's attempting to pass high school despite being a shut in. Fortunately though, she lives with her older brother Kamiomi, who happens to be a teacher at the school. Not to mention, her “Brother Surveillance Tool” which will, theoretically, allow her to view her brother's interactions with three very odd sisters, who inexplicably seem to have had their ages reversed and have various types of “interest” in Kamiomi. And then things start to get really weird…