The Story is about a high school girl namend Hina and her classmate Gen.
Their parents get married and now Hina and Gen are stepbrother and stepsister.

Gen is an Mangaka and really cold to Hina and the other family members, but Hina wants to befriend with Gen...

Contains a side story.
Contains one shot: Naisho no Yuusha-kun (ナイショの勇者くん)