This show takes place near Hinamizawa.Some critics say this anime is too quiet. Yes, too quiet.
Natsumi Koshigaya is Ichika Takatsuki in the future.A lot of alien abductions happen in the countryside so she might have been abducted by aliens. The two also share the same hair color, eye color, messy hairstyle, and uniform style (except for the glasses, but anyone can wear glasses).
One of the girls is a ghost, and it's up to us to figure out who.Because every heartwarming show needs a Poison Oak Epileptic Trees, like Yuyushiki 's puppet theory and Yuru-Yuri 's "Groundhog Day" Loop theory.
Kazuho is not really Renge's sister...Kazuho is actually Renge's mother! Kazuho must how somehow gotten pregnant during her final year of high school, and since she's already out of town for school, no one in town would have noticed (except for Hikage and the Miyauchi 'parents'). The Miyauchi 'mother' could have simply pretended to be pregnant until Renge was born. Kazuho's depression (as evidenced by her oversleeping), lack of appearances (although mentioned) during flashbacks, and sharing the same futon at home as Renge points to this.