This one is hilarious. Mc is a military otaku. After she gets reincarnated in another world of swords and magic she tries to develop modern technology of our world with magic there. She could already create a gun with earth magic and the help of a spirit.
You may feel your favorite manga should be gathered together into distinct categories for your own reference and, now, you can do this with a LIST. After you've created your list or lists, you can proudly recommend them to other manga fans to showcase and share your taste in manga.
The Villain's Savior