Kandachime

In this manga, Kandachimes are swords that were given intense emotions since their forging, allowing them to develop a human female form. Takuma Zushi is on his way home and witnesses a fight between a young girl and a man for the ownership of a Kandachime. The young girl, Otowa Hagane, is about to lose when he steps in and unknowingly summons his own Kandachime and cuts the man's sword in half. After that, he is plunged into a world of fighting.

It's not far along, but I definitely recommend this manga series.

Thought this existed already cuz someone made a sexual comment about Mumiyo, and something that had to do with splitting private parts.

Tried searching for it and couldn't find it.

It's... okay. The story isn't great but it isn't bad either. I like the concept of having swords that can change forms though. Also there was a somewhat large plot twist recently. It's definitely a manga to look out for though because it could be really awesome.