Kugami Sugara just wants to lead a peaceful school life. But being chosen by the beautiful and talented Shirasagi Yui to be her pseudo 'sister', her life is anything but peaceful. And to make things even mo...

The setting is Lillian Academy, a private Catholic all-girls school where the student council is known as the Yamayurikai (Mountain Lily Council) and younger students are taken under the wing of older studen...

One day, while Shirou was delivering a secret weapon to his colleague, he met Amane Mao, a super strong girl who is capable of lifting cars. Suddenly, an ERROR, a monster that struck Old Tokyo 14 years ago, ...