Manga Like Chainsaw Man

After witnessing someone die, 13-year-old Rachel "Ray" Gardner is brought to the hospital for counseling. However, she instead wakes up in the sixth basement of an abandoned building with no other memories. While blindly wandering around, she is branded a "sacrifice" and encounters a cowled figure covered in bandages from head to toe, wielding a scythe at her. At first, the hooded man, Isaac "Zack" Foster, desires to kill Ray. But upon deeming her boring, Zack changes his mind and instead cooperates with her to escape the dilapidated structure. Adapted from the Japanese horror adventure game of the same name, Satsuriku no Tenshi follows Ray and Zack as they evade numerous barriers, traps, and guards all while unraveling both of their dark pasts. [Written by MAL Rewrite]

It was just an ordinary day at Yami High... until it wasn't. A ringing cell phone and the splatter of blood marked the beginning of a deadly game. The rules: Contractor Mikiya has thirty days to curse-kill thirty people-or meet a fate worse than death. On the other side, Curse-Breaker Saeyama must identify the killer... without falling prey to one of Mikiya’s curse-kills. Only time will tell who will emerge victorious... (Source: Yen Press)

Saying farewell to a classmate is never easy, but it is the reality a group of students at Kisaragi Academy must face. In an attempt to alleviate the sadness caused by their friend's departure, they perform a ritual that will bond them all together eternally as friends: the Sachiko-san Ever After charm. But after it is completed, the floor beneath them gives way and they are sucked into a gaping abyss. After getting their bearings, the students discover their surroundings have drastically changed. While it appears they are still in a school, it is not the one they know; rather, it is a run-down version of Tenjin Elementary School, the place that Kisaragi Academy was built upon after a series of kidnappings and brutal murders led to its demolition. What's more, and frightening, is the appearance of the malevolent ghosts of the murdered children. As these students navigate this ghostly labyrinth with no escape in sight, they come face to face with the evil that brought them there, and the truth behind the gruesome murders of Tenjin Elementary School. [Written by MAL Rewrite]

There once lived a vampire known as Vanitas, hated by his own kind for being born under a full blue moon, as most arise on the night of a crimson one. Afraid and alone, he created the Book of Vanitas, a cursed grimoire that would one day take his vengeance on all vampires; this is how the story goes, at least. Vanitas no Karte follows Noé Archiviste, a young man who is traveling aboard an airship in 19th-century Paris with one goal in mind: to find the Book of Vanitas. A sudden vampire attack leads him to meet the enigmatic Vanitas, a doctor who specializes in vampires and, much to Noé's surprise, an entirely ordinary human. The mysterious doctor has inherited both the name and the infamous text from the Vanitas of legend, using the grimoire to heal his patients. But behind his kind demeanor lies something a bit more sinister. [Written by MAL Rewrite]