Meisou! Underworld

Alt title: Wander! Underworld

If you're looking for anime similar to Meisou! Underworld, you might like these titles.

Ga-Rei -Zero-

Ga-Rei -Zero-

Kagura and Yomi are two girls who have a bond that cannot be broken. While once they fought side by side against the supernatural forces that threaten the planet, fate had something different in store for these star-crossed companions. Yet to understand the present, one must first experience the past – a time before Kagura’s involvement with the Supernatural Disaster Prevention Agency. Always cheery and good-natured to a fault, the young Kagura first meets Yomi when she is invited into her home. Over time, the two battle malicious spirits and grow closer together – but soon, more terrifying foes begin to reveal themselves. A swarm of glowing blue butterflies and a mysterious stone are harbingers of darker things to come, and one thing’s for sure: Kagura and Yomi will never be the same.

I agree

Sword Gai: The Animation

Sword Gai: The Animation

A young man becomes host to a legendary infernal sword and, with the fate of humanity now in his arm, wields its demonic power against his enemies.

I agree

Oni

Oni

One night, as their elderly mother lies sick in bed reminiscing of the hardships in her life, two brothers head out into the black night to hunt deer. As they head deeper into the forest they are aware of something approaching but dismiss it as little more than the wind and continue on their way. However, as they set a trap for their prey and lay in wait, one of the hunters is captured and only released when his brother shoots the mystery attacker's arm off. Discovering that it is the arm of a demon they have acquired, the pair returns home to find the shock of their lives...

I agree

Sword Gai: The Animation Part II

Sword Gai: The Animation Part II

While the cursed power of Shiryu grows stronger within Gai each day, both Shoshidai and the mysterious Gabi continue their mission to protect mankind.

I agree

Hell Teacher Nube OVA

Hell Teacher Nube OVA

Nube fights a demon who resides inside walls, confronts a young spirit who wants her harmonica back, and in the end he must battle a powerful demon named Zekki, a demon that resides within Nueno.

I agree

Taboo-Tattoo

Taboo-Tattoo

"Tattoos" - ancient weapons that drastically enhance the physical abilities of their users, known as the "Sealed," allowing them to bring forth supernatural phenomena when activated through the charging of the user's own unique "trigger." When Justice Akatsuka (a.k.a. "Seigi") saves a man from some street punks, the man gives him a strange stone as a token of gratitude. The moment Seigi accepts it, a mysterious tattoo appears on his palm. And so the battle begins, framed by a web of conspiracies and centering around Justice Akatsuka, the boy who obtained a "tattoo" by complete chance.

I agree

Devilman: The Demon Bird

Devilman: The Demon Bird

Demons exist and their power is beyond what humans can fathom. In fact they are so strong that humans do not stand a chance against them in a fight. The only thing strong enough to defeat a demon is another demon and it is trough this logic that Ryo Asuka hatches the plan to have his good-hearted friend Akira Fudo possessed by a demon. If a person is of pure of heart then he might be able to control the demon that posses him and thereby acquire power equal to a demon. After raising some hell in a club the plan works and Akira is possessed by the powerful demon known as Amon. Now Akira is humanities sole champion of justice against the hidden demon menace that has plagued humanity since the dawn of time.

I agree

Amon: Apocalypse of Devilman

Amon: Apocalypse of Devilman

Time has passed since Akira Fudo was possessed by the powerful demon Amon, giving him the ability to change into Devilman. Humans have become increasingly paranoid of demon attacks, resorting to murder of innocent civilians with mob mentality – among nicer things. Akira continues to fight against the demon armies with his companions – but when his girlfriend Miki is brutally murdered, his will breaks and the sadistic Amon is unleashed, controlling his body. The final battle awaits in Akira’s mind – can he defeat Amon and control his body once more?

I agree

Devil Lady

Devil Lady

Ms. Jun Fudo used to be nothing more than a successful model, until fate intervened and thrust her unwillingly into the role of the Devil Lady. Once transformed, Jun becomes a murderous beast who destroys anyone (or anything) that opposes her; a power that the mysterious Asuka Ran wants to harness and use for an unknown purpose. With similar beasts emerging across the city and the body count piling, can Jun survive long enough to discover the truth behind her kin, and keep her human soul in control?

I agree

Yu Yu Hakusho

Yu Yu Hakusho

Yusuke Urameshi was a normal middle school punk until he was hit and killed by a car, while saving a child. His selfless action earned him the right to gain his life back and serve as a detective of the spirit world, keeping the world of the living safe from a myriad of demons. But being reborn has its price: Yusuke must hatch a spirit beast that will develop according to his actions, and if he doesn't act in a good and honest manner, it will eat his soul. Can Yusuke protect the human and spirit worlds and still manage to save himself in the process?

I agree