If you liked the Blood The Last Vampire anime, the Anime-Planet community thinks you'd like:
When the infected approached Rei and Takashi's school, it led to a gruesome blood bath that left the majority of students and staff dead or turned into the zombie-like monsters that have spread throughout the world. Together with a handful of other survivors, Rei and Takashi set forth to find their families in a world that is rapidly detoriating. Governments have collapsed, the killer disease is out of control, and people everywhere are trying their best to simply live through each day...
The undead and the underworld are key elements in HOTD and Blood the Last Vampire. Both are action series following high school student(s) trying to fight the living dead and ensure their own survival. Though they are a bit different in style, I recommend watching both.
High School of the Dead and Blood the Last Vampire have high schoolers fighting against the forces of the undead. Both series are action packed with the students trying to survive the onslaught of underworld beings.
Unbeknownst to humans, demons from an overlapping dimension walk amongst them in the streets of Tokyo. The balance between the worlds is kept by the crow guardian Karas and Yurine, its master and voice of the living city. However, the time of harmony nears the end as the once-Karas Lord Eko returns. Seeking to purge humanity for its evils, he terrorizes the city with his minions that feast on human blood. The ultimate battle between good and evil awaits; can Yurine and her newly initiated Karas prevail against Lord Eko and protect their city against his monstrous horde?
Beautiful animation? Check. Perfect integration of CG? Check. Some of THE most badass fight scenes around? Check. Blood and Karas are two brutal, dark, and positively awesome romps of violence and fun with little focus on the story and more focus on gritty realism, awesome cinematography, and as much ass-kicking as can possibly be jammed into a short amount of time.
The dark, heavy environment that is seen in Karas is duplicated in Blood the Last Vampire with violence galore and intense fighting scenes.
With a past shrouded in mystery and a blank memory, Shiki Tohno seems to be just another "average high school student". That is, until he nearly kills a female vampire with his secret deadly ability to "see the lines". His journey to unlock the secrets of the Tohno family and unbury his own lost memories has only just begun, and now he must also help the woman, Arcueid Brunestud, find a lethal phantom named Roa, and kill it using his ability.
The same feeling runs through Lunar Legend Tsukihime and Blood the Last Vampire. The main characters strive to kill vampires that are attacking everyone.
Yakumo was just a normal boy... until he died in a tragic accident. Now, resurrected by the last of a race of powerful creatures, he has become her Wu, an immortal servant. Together, they must battle against Benares, the all-powerful Wu of the dark lord Shiva. What dark secrets from Pai's past will this battle unearth?
Setsuno Muda is a high school boy with a cruel fate, trapped in a forbidden love for his blood sister and inhabited by the spirit of the Organic Angel Alexiel. As the final battle between Heaven and Hell approaches, and forces gather against him, he must soon make decisions that will inevitably alter his future for better or worse. But for poor young Setsuno, his anguish and torment might be more overwhelming than the blood on his hands, as conflicts are settled and lives are changed forever...
I have no idea how anyone could actually understand my reasoning for this. Fore extreme violence doth take place. The plots are completely different, but both tended to make me stop and really question about the existence of a divine creator. Both anime also have an almost dirty feel to the animation.