Maison Ikkoku: Kanketsu-hen
Maison Ikkoku: Final Chapter
めぞん一刻 完結篇
The Maison Ikkoku tennants throw a party to celebrate the marriage of Yuusaku and Kyouko. However, during the party Yuusaku hears that Kyouko is waiting for a letter. He becomes jealous and begins to doubt Kyouko, worrying that she still loves someone else. When the morning arrives, the answer to his worries is revealed...
(Source: AniDB)