Kindan Shitei de Breakthrough: Boy Meets Satan

Eirth, the son of a legendary hero who defeated the Great Demon King, has grown up under the weight of his father's expectations. As a result, he has always felt like he is living in the shadow of his father's accomplishments. Despite his best efforts, Eirth's achievements are never enough to satisfy those around him, who view him as a disappointment compared to his illustrious parent. The constant pressure and criticism have taken a toll on Eirth, leaving him feeling isolated and uncertain about his own abilities. In a moment of unexpected clarity, Eirth discovers a mysterious room containing his father's sword, and within it, he encounters the ghost of the Demon King. The Demon King, once a formidable foe, now seems to be taking an interest in Eirth, offering to provide him with special personal training. Eirth is initially skeptical, but the Demon King's words and actions are laced with an air of sincerity, and he finds himself drawn to the offer. The Demon King's intentions are clear: he wants to help Eirth surpass his father's accomplishments and prove himself as a worthy successor. However, Eirth's desire for revenge against his parents and the world drives him to accept the Demon King's offer, and he embarks on a journey that will shake the foundations of the world.