This is the story of a lonely guy and a succubus with an agenda. During the kiss, unbeknown to him, he had signed a contract with her, and in the morning realized that he has turned into a girl. That's how his adventure begins. Will he take advantage of this situation? Will he get rid of the shackles of the contract? Where will the future take him, and will he want to break this contract with the succubus? It's up to you to find out.