Shoujo-tachi no Sadism The Animation Episode 1

Shinya’s school days are boring until Akane, a woman that his brother was to marry due to a family arrangement, started attending the same school that he was attending. Shinya remembers meeting Akane when they were younger and that they made a promise

There is a beautiful princess, Janne, in a beautiful country. She has a special ability in sword technique and magic. The country is peaceful but monsters called ogres start to attack them. Janne takes an initiative and battles the ogres but her younger sis