香織がソロパート演奏の座を得るために滝先生に処女を捧げるH本!!バックで中出しされて性奴隷へ堕ちてしまう…

In this H-book, Kaori gives up her virginity to Taki-sensei in order to get a place to play the solo part! She is creampied from behind and falls into the role of a sex slave...