"Big Brother... does Fei Ku really have to go?"
She was thrown into the world of ten years ago.
"Sawada... does Fei Ku really have to do this?"
She was thrown back into the family where her big brother lived.
"Fei Ku is on Big Brother's side, right?"
"Fei Ku is on Penggele's side, right?"
Fei Ku doesn't know...
Fei Ku really doesn't know anything.
This is the story of a naturally clueless girl torn between her big brother and the battle involving Penggele.
Who is her brother? Bailan? It's impossible! And my brother's family is Vongola, Could it be one of the guardians...