Myself; Yourself, Yosuga no Sora: In Solitude, Where We Are Least Alone. Recommendations
Main character moving back to a town he lived in as a child. Dark depressing mood in both anime.
Main character returns to the town he lived in as a child and finds people he knew from back then. Both are dark and gloomy anime and have a feeling of mystery about them.
Both have dark setting, boy returning back to town, meeting childhood friends and twincest.
Returning to his hometown. Childhood friends.
Drama, better than average plot
YnS main plot and M;Y side/subplot are similar in that they deal with incest. Both anime tell the story/arc near the end of their season. Where YnS deals with both MC, M;Y is focused on the "supporting IMO" BroSis. Both anime leave an open ending where both respective siblings move out of the country after a taboo/scandal respectively was found out by the locals, YnS was voluntarily while M;Y was forced.