Cometman: The Original Cut

Christine Ryder is a normal French girl dealing with normal teenage girl problems. That is, until she comes face to face with a talking meteor from another dimension named Comet. Through a process called the Agnition, Christine and Comet can combine together to form a mighty hero. The two of them use their newfound powers to protect others from threats too great for normal beings to handle. This is the story of Cometman, the greatest hero the galaxy has ever known.

Isekai Science Superhero Teenagers (13-18)
shonen Superhero