The Sage

The all-knowing and flawless, the "Ancient" Sage, who is spoken of as a legend. The previous owner of the items in the house from another world. In this world, he is a historical celebrity who was even invited by the gods to ascend to divinity, but he declined and chose to live his life as a human. He left a will stating, "I will transfer the ownership of the house and its contents to the next person who visits," and fulfilled his natural lifespan in a cave near the house. He died alone in the cursed forest, with no one to see him off, and his remains were left to decay into bones. When Yūya visited the place, he transferred his unique and rare magical circuits to Yūya, enabling him to use magic. When Yūya time-traveled to the past, he met him directly, and although he forgot about Yūya due to corrections when Yūya returned to the future, he had manipulated himself so that the items would be passed to Yūya, leading to the aforementioned will.