My Fiancé Forgot About Me, So I Entered a Fake Engagement with the Neighboring Prince

Alternative

My Fiancé Forgot About Me, So I Entered a Fake Engagement with the Neighboring Prince (But Apparently, I’m His True Love!?) ; 婚約者に忘れられた私、隣国の皇太子殿下と偽装婚約することになりました（※ただし、殿下の本命は私みたいです！？） ; Konyakusha ni Wasurerareta Watashi Ringoku no Koutaishi Denka to Gisou Konyaku suru Koto ni narimashita (※Tadashi, Denka no Honmei wa Watashi Mitai desu!?)