It uses some elements from generic isekai (parallel world) stories, but those elements are used in a very well way creating an amazing adventure story.
The story starts with one of the main characters waking up in a strange world, alone, realizing that he just died and got reincarnated into a sword (Shisho). The first episode maybe be a bit cliche, the character gets to moves around thanks to magic and kill the monsters around and powering up, until he gets stuck in a place where he can't use magic, and he stays there until the other main character finds him, a little cat-girl called Fran, who is a slave trying to flee from her owners. The meet of those two characters is where the real adventure starts. With help of Shisho, Fran gets really strong but she still have many weakness that she will have to overcome overtime. Both characters are super charismatics, Fran can be very cute and very scary, she won't show any hesitation when killing an enemy, and Shisho treats her as if she was her own daughter, supporting her all the way though.
For me, the biggest points on this series:
- The main characters (Shisho and Fran) are very charismatic
- Great fight scenes. Animators really did a great job animating the scenes.
- Great BGM, the BGM of when Fran is fighting is spectacular. Yasuharu Takanashi really did a great job on this production.
-The story won't let you get you bored, Fran and Shisho will face more and more strong enemies, but it's also very fun on their daily life, when they are just on a day-off from adventure.
For anyone who enjoyes a fantasy story, I recommend this anime a lot.