Swords and Sisters

When he got home drunk in the middle of the night, the first thing he did was draw a magic circle in hopes to summon his dream big sister. Unexpectedly, the drawn magic circle emitted light and swallowed him. Swords and magic dominated the world he was transported into.  Despite being unaware of the dangers he would encounter, he was eager to fulfill his mission, which was... Gather the world's greatest big sisters and accompany him as he uncovers the truth about the world and why he was in it.