Sent to an all-girls boarding school due to her father's overseas job, Sarah Crewe is a promising young girl who excels both academically and socially in her new life in London. However, her world is turned upside down when she is called into the headmistress' office and informed of news that no child wants to hear: her father has passed away. Now an orphan, Sarah is stripped of her status as a student and is forced to work in the boarding school as a maid in order to support herself. To make matters worse, her once friendly peers suddenly turn against her upon hearing about her fall from wealth. Coming to terms with the unfortunate situation she faces, Sarah must learn to persevere and form new friendships in order to regain her dignity as well as her identity. [Written by MAL Rewrite]

This story takes place about one hundred years ago. Nadja is a bright, cheerful girl who was raised in an orphanage near London, England. Nadja was entrusted to the orphanage when she was a baby. So she thought her father and mother were dead. But before her thirteenth birthday, she found out that her mother might be alive.. Nadja sets out on a journey to find her mother! With all of Europe as the stage, Nadja's exciting adventure begins!

Momoko, who attends a special school, is both mentally and physically disabled. Every morning she becomes peevish because she can't go to the ordinary school with her twin brother Riki. Her family soothes Momoko by singing her favorite song "The Song of Frogs." One day, Momoko shouts encouragement to Riki who's playing dodgeball at an open classroom day and Riki's team wins the game. Ryuji, whose team lost the game, is not impressed and demands that Riki stop bringing his 'idiot sister' to school. Riki totally loses control and hits Ryuji with all his might. The following year, an experiment in integrated education is implemented and Momoko begins to attend Riki's school. Unfortunately, her physical condition takes a turn for the worse and she's sent to a hospital. Riki and all her classmates want to cheer her up and they set a goal of winning a relay race so that they would be able to tell Momoko the good news. Meanwhile, the fastest sprinter, Ryuichi, insists that he won't be taking part in the race.

Unaired anime episode bundled with the limited edition of High School DxD DX.1.