The porn video tag "taishou-mebiusline" is a combination of two terms in Japanese: 大将 (Taishou) and メビウスライン (Mebiusu Raine). 大将 can be translated as "admiral," while メビウスライン refers to the famous Möbius strip-shaped asteroid belt, Meiō no Sekime, in Japanese popular culture.
In this context, the porn video tag suggests a scenario that involves an Admiral (possibly in a science fiction or futuristic setting) and a Möbius strip-shaped asteroid belt, which might serve as a backdrop for the scene or be incorporated into the sexual acts depicted in the video.
Please note that this description contains mature themes and is intended for adult audiences only.