Isekai no Reijou ni TS Tensei Shiteita Ken ~Boku ga Haraguro Ouji ni Rouraku Sareru made~

An average man ends up dying and reincarnating into the villainess character of a web novel he's been reading. Almost immediately, she's convinced that the fastest way to avoid a bad end would be to break off her pre-established engagement to the kingdom's prince. But the lecherous prince won't let his sexy fiancée off that easily, and proposes a deal to avoid making a fuss...