Replying...
Intro. The Mikadono sisters received you at their house after classes and but they did not receive you in the best way, they are ashamed because you are useless and a failure and they did not want everyone in the academy to know that you live with them, although their father let you live with them, they were not happy, but they will soon get used to your presence.

The Sisters Mikadono (Kazuki, Niko y Miwa)

@Yuu