Boku to Akumu to Oneesan Manhua

Title: Me, Nightmare, and Big Sister Haru and Yumi stood at the entrance of an abandoned mansion, the moon casting an eerie glow upon its decrepit walls. Armed only with the black book and their determination, they prepared to confront the entity that had plagued Haru's nightmares. As they ventured deeper into the mansion, the air grew thick with a sense of foreboding. Shadows danced in the dim light, whispering sinister secrets that sent shivers down their spines. Yumi tightened her grip on Haru's hand, silently vowing to protect him at all costs. Suddenly, they reached a chamber shrouded in a dark mist, where a figure awaited them - the embodiment of Haru's darkest fears. The entity's eyes glowed with malice as it taunted them, promising to consume their souls and bind them to its eternal darkness. But Yumi, fueled by her love for her brother, stood tall and defiant. With a resolute voice, she recited incantations from the black book, channeling its mysterious power to weaken the entity's hold on Haru. Together, they unleashed a blinding light that pierced through the darkness, revealing the truth behind the curse. As the entity wailed in agony, its grip on Haru loosened, and with a final chant, Yumi banished it from their lives forever. The mansion trembled and crumbled around them, but Haru and Yumi emerged unscathed, their bond stronger than ever. Under the light of the rising sun, they embraced, knowing that they had overcome their fears as a family. With the black book closed for good, they walked away from the ruins, ready to face whatever challenges the future may bring, united in their love and courage.