(This is the second book of my first book, 'how cute'.Don't worry there's a summary of the first book in the very first chapter)
You start training with this guy who calls himself Shironeki.
You improve a lot with him actually.One night he takes off his mask and something at the back of your head tingles.He looked familiar.
Through the book you find clues and things that lead to the past.The past of Shironeki.Even your past.
Who knows.Who is Shironeki.Who are you?
(Bare with me as there is swearing in this book)