Ai to Ken no Camelot: Mangaka Marina Time Slip Jiken
English title: Camelot
Japanese title: 愛と剣のキャメロット まんが家マリナ タイムスリップ事件
Alternative titles: Marina the Manga Artist Goes to Camelot
Type: Movie
Source: Light novel
Episodes: 1
Status: Finished Airing
Aired: Aug 25, 1990
Duration: 48 min
Rating: PG-13 - Teens 13 or older
Studios: Ashi Productions
Genres: Adventure, Comedy, Fantasy

Self-described "third-rate" mangaka Ikeda Marina is attending a birthday party for a wealthy friend, when suddenly a time-traveling dragon whisks the entire party away to Camelot in sixth-century Britain. There, Marina must help would-be king Arthur fend off civil war by extracting the sword Excalibur from its stone during the forthcoming solar eclipse. But the evil Lady Dola intends to thwart this plan and seize Camelot for herself...

(Source: Collectr's Blog)