CITY HUNTER: FROM TODAY, CITY HUNTER

"Kai Aoyama is 40 years old and single. She thought she died the day she was hit by a train, but instead herself reborn as a high schooler in the world of her favorite manga, City Hunter. Lost with no where to go, she heads to a message board in Shinjuku, and frantically scribbles the letters, ""XYZ"". From here, her new life begins with Ryo and Kai in the world of City Hunter!"

(Source: MangaPlaza, edited)