An unreleased episode of Kakyuusei that was available on the 7th VHS/DVD. It is set in an alternate universe where Ai and Miko aren't the main heroines. It focuses on Tina's (an alien who can fly) love conquest of Tsuyoshi. Tina, along with several other characters featured, were absent from the main series.
Watch Kakyuusei: Hajimemashite Tina! episode 1 online — subbed and dubbed, with automatic AniList / MyAnimeList progress sync.