Demon Slayer: Dedicated to the Fallen Princess at the Beginning

[Demon Slayer fanfic] + [Curse Breathing Technique] + [Save the original character] + [Not invincible] In Ogimachi Village, a villager was eaten by an evil spirit. The protagonist Akutagawa Yosomaru was inexplicably blamed for this and was tied to a pyre by the villagers and burned at the stake. When he failed to escape and was completely desperate, he was saved by the village chief. As a result, he didn't expect that Lao Deng was not a good person, so he turned around and offered him to Fallen Princess as blood food in exchange for money. At the beginning of Tianbeng, Yasumaru once again fell into despair. Fortunately, the Demon Slayer Squad's water column arrived in time, and then... Then this old water column that he had never seen before succeeded in giving it away, and was instantly killed by the prostitute Taro. Ye Shengmaru looked at the eyes of Fallen Princess and Prostitute Taro, and once again fell into despair... Tips: 1. The identity of the protagonist is unusual and has a system, but it does not come with the appearance. It will be obtained in an unexpected way. 2. The protagonist is not an invincible boss at the beginning, but a bitter rookie who was born with a short lifespan and a curse. 3. While the protagonist comprehends [The Breath of the Curse], he also relies on killing evil ghosts to increase his lifespan, and gradually grows and becomes stronger in actual battles.