The story revolves around Yuuki Kagami, a boy who enrolls in the academy of his dreams as a honors student — and is mistakenly put in the girls’ dormitory where boys are prohibited. Faced with the possibility of having to leave the school, Yuuki has to dress up as a girl in the dormitory. On top of things, he ends up rooming with the female teacher Ayana Kakinozaka, who has to watch over him.
Title: Aneki no Kounai Kaikinbi
Japanese Title: アネキの口内解禁日
Released Date: Feb 17, 2012
When 23-year-old Hirose Anna finds out that her little brother masturbates with her dirty underwear, she decides to take things a step further by allowing him to see her do naughty things as well. Each time the situations escalate until she comes out and tells him that as his big sister she will take responsibility for his sexual curiosity. She allows him to do anything with her except for proper sex; yet as his requests get dirtier each time, she remains determined to take responsibility and keep things going no matter what.
(Source: ANN, modified at BakaBT)
An incest story about two cousins who only have a week together.
Title: Mouryou no Nie
Aired: Dec 21, 2012 to Mar 15, 2013
Hundreds of years ago, a big war between humans and monsters happened. Humans somehow won the war and sealed up the monsters deep in the mountains…. Hayato, Chihiro and Suzuna work hard to eliminate and seal up evil monsters every day. They are actually monsters, but they just want to coexist with humans. One day, they hear that the monsters sealed up hundreds of years ago are about to come out…. To stop it, they decide to visit the place….