Feeling a bit isolated in school, Sasami gets Kagami to be friends with her in order to attract more friends. However, Kagami doesn't seem particularly interested since most of Sasami's suggested activities are unneccessary for her as a robot. Later that night, Sasami finds Kagami in a bloodied state, though she still refuses to be open with her. She becomes upset when she sees Kagami allegedly making some other friends, but cheers up after spending some time playing with Tama, who assures her that Kagami appreciates her friendship. Sasami soon comes to realise that the Myriad Gods are attacking Kagami out of jealousy for being chosen by Sasami to be her friend. After catching up to Kagami after she destroying all the gods inhabiting the school, she learns the girls she saw Kagami hang out were possessed by gods which she purified. Sasami apologises and asks Kagami to become her earnest friend, which she graciously accepts.
The Japanese call them hikikomori-people who've become so withdrawn socially that they refuse to leave their homes for weeks and even months at a time. For Sasami Tsukuyomi, who's attempting to pass her first year of high school despite being a shut in, it's more than just a word. Fortunately though, she lives with her older brother Kamiomi, who just happens to be a teacher at the school Sasami is supposed to attend. Not to mention, her "Brother Surveillance Tool" which lets her view the outside world via her computer and will, theoretically, allow her to readjust to interfacing with people again. What it mainly does, however, is let her view her brother's interactions with the three very odd Yagami 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... Magical powers? Everything turning into chocolate? Is life via the web warping Sasami's brain, or is it the universe that's going ...
