Demon Slayer: Kimetsu No Yaiba: Dark Abyss Single Blade and Butterfly Breath

In the dark abyss, the young boy Sosuke Fukaya spent countless days and nights without seeing the light of day. All that's left in the world is the cold stone walls, the smell of blood, and the knife waving for unknown reasons in his hand. There were only two "masters" accompanying him - one with a voice as gentle as spring water, and the other with a tone as cold as cold iron. He knew that there were six other people who were "vessels" like him and were cursed "seven stars" who needed to be awakened into sharp blades under the bloody sun and moon of their step-brothers. After breaking away from the eternal night, Sosuke stepped into the sunshine and shadow of the Taisho era, with the sole purpose of finding companions and finding out the truth about his bloodline. But fate led him to the Butterfly House and met Butterfly Ninja. She is a gentle healer, the poison of the wisteria flower on her fingertips can heal injuries or kill; she is also a calm swordsman, with eyes as sharp as butterfly wings. Shinobu could see through the confusion and sharpness beneath his scars. The deep tenacity and strength made it impossible for her to regard him as an ordinary swordsman. Regardless of the past, she gave him peace in a unique way, saw the unquenched spark in his eyes, and foresaw the troubles between him and his companions. In order to protect the light and cut off fate, Aosuke holds the sword tightly and resists the threats of the abyss and Onibatsuji under the firm gaze of Shinobu. In the trial of blood and fire, he will prove that even if he is born in eternal night, the light of the seven stars will eventually tear apart the darkness.