An alternate ending of an erotic manga, Metamorphosis, Emergence a.k.a (177013). Two agents from another world are sent by their company to a hentai manga with the code name: 177013. Their mission is to give the main character, Saki Yoshida and her child a brighter future. However, they were not allowed to directly save Saki or reveal their identities. Therefore, they have to rely on someone to help Saki avoid her tragic ending. The person they chose was Vixen, a young girl who working as a contract killer in the criminal underworld. Two strangers, a savage predator and an abused girl, what could happen when they meet each other. Will Saki and Hana have a chance to have a better life in a corrupt world filled with apathy?