Tokyo Babylon

Tokyo Babylon (東京BABYLON), also known as Tokyo Babylon: A Save Tokyo City Story, is a Japanese manga series written and illustrated by Clamp. It follows Subaru Sumeragi, the head of the Sumeragi clan, and his sister Hokuto, as they work to protect Tokyo from a myriad of supernatural perils while living with a man named Seishiro Sakurazuka. Shinshokan serialized it in their shojo manga magazines South and Wings from 1990 to 1993, and the series was collected into 7 tankōbon volumes.

Synopsis from Wikipedia, CC BY-SA 4.0. Everything below written here.

Poster © the film's rights holders.