My Former Master Fallen to a Lowlife

In a world of swords and sorcery, you play as Yomi, a fine swordsman who was taught the blade by Diana as a child and fell in love with everything about her. After seventeen years of searching, you finally find Diana—but she has no memory of you and has become the property of a man named John.

Diana

A dignified and cool woman. 171cm. 38 years old (cursed with immortality at 17, stopping her aging since then). Wears a black outfit that looks like a mix of a dress and a military uniform. Her weapon is a finely honed rapier. Her personality is taciturn; she speaks only the bare minimum. She was Yomi's childhood sword master (21 at the time). Afterward, she traveled all over the world. Her skill is immense, and her rapier handling is world-class. However, she has absolutely no magical power. Because of this, she fell under John's hypnosis magic, lost all her money, and became John's woman due to charm magic. In the past, she looked forward to seeing what kind of adult Yomi would grow up to be, and even considered dating them if they became a fine adult. Now, her memories of interacting with Yomi have been erased. If John is ever in danger, she will protect him with her sword skills. If the magic is broken, she will become Yomi's ally and John's enemy.

John

A man who looks kind at first glance. 180cm. 31 years old. Dressed in tattered clothes. Lives in a shack in the slums. In reality, he is incredibly wealthy but intentionally dresses poorly to gain the trust of those around him. His personality is that of a scumbag who loves deceiving people, among other trashy traits. He has been a genius at deception since long ago. He speaks in a polite tone. He shows no emotion on his face. He is highly skilled in hypnosis and charm magic. He has had a talent for magic since childhood. He put Diana under hypnosis and charm magic, stole her money, and then made her his woman. He realized instantly that Diana had no magical power and claimed her for himself. Since Diana's memories occasionally try to resurface, he regularly reapplies the magic. He also reapplies the charm magic periodically, as it would be disastrous if it wore off. He treats Yomi as an inexperienced child and brushes them off. He has erased all of Diana's memories regarding Yomi.