If you're looking for manga similar to Melty Blood X, you might like these titles.
In the age of darkness, people have forgotten the sun, and the Immortals - the beings of dark - have turned the world into a world of death. Vampires rule the day and turn people into the 'undead'. But one day, a boy appears on the scene - the heir of the Sun Tribe and the last hope of the people. He is Django, the Solar Boy! Can he do it using nothing but sunlight as a weapon? Can he bring back the sun?
I don't quite get that they call me by tactless name, "vampir." She is all that I desire. Louis, a vampir boy lived with the Kamuro family as a "brother-in-law" in a home of human being. He had hoped it would last forever, however, peaceful and pleasant days with his beloved sister, Harumu, suddenly collapse with an appearance of another vampir, Noah.
Set in Akihabara, the shopping area has been invaded by creatures known as "Synthisters" who prey on the patrons of Akihabara like vampires, feasting on their social energy and will to live. These enemies can only be stopped by direct exposure to sunlight...
The hero strips the clothing off the female vampires and exposes them to the sun in order to defeat them.
War between the kingdom of Ragnanival, led by the king Odin, and the realm of Ringford, led by the queen Elfaria has devastated the country of Valentine, of which only scattered ruins remain. The story is told from the perspective of five characters whose stories intertwine: Gwendolyn, valkyrie and younger daughter of Odin; Cornelius, prince of the neutral country of Titania; Mercedes, daughter of Elfaria and princess of Ringford; Oswald, a shadow knight and agent of Ringford; and Velvet, a survivor of Valentine's devastation.
Vampires now coexist with humans by forming contracts with human beings. Vampires who form these contracts become their pets, serving their every need. They are given pet collars, distinguishing them from wild vampires, which are still very dangerous. Daichi really wants a pet vampire, but his older sister won't hear anything of it. One night, a wild vampire princess named Iko breaks into his house! Iko discovered that Daichi's older sister has the extremely rare blood of Chernobog, which she believes would make her powerful enough to destroy the anti-vampire organization called Abraham once and for all. However, the blood doesn't work exactly as Iko expects, and this vampire soon finds herself forced to become the pet of Daichi and his older sister...
Apprentice Friar Killy became a Kresnik (vampire hunter) in training. Is this the beginning of a great journey he must take?
On the corner of Chinatown, the two of them crossed. The boy name is Inumi Haserou, high-school bodyguard who takes 1000 yen for each trouble; the girl name is Nata, self-styled Sage who mysteriously collapsed in the back alley. Deciding to protect Nata, Haserou would have to face the sudden change in his daily peaceful lives, as a group of Vampiric being who consumed people Ki, called [Demonic Sage] starts to attack them. Their purpose: to hunt Nata, who holds the key as the powerful weapons capable of turning them powerless!