【Netcon 11 Gold Award Winner! Book and Manga Adaptation Decided!】 【Volumes 1-2 of the novel are now on sale!】 Life was not smooth sailing for the old man living in the forest. In a world where everyone makes contracts with monsters, the old man's partner was a slime. Even now, the old man was living day by day by handling garbage, but he suddenly realized that the slime he spoke to had intelligence. The old man was delighted as his bond with the slime deepened, but he passed away peacefully in his sleep due to his advanced age. When he opened his eyes, he found himself in the familiar old house. The young appearance of his deceased best friend. He had also returned to his youth. He didn't know what had happened. However, with this second chance at life, he decided to live it through with the slime. An adventure tale that begins with the mysterious return to the past. Also posted on Kakuyomu, Alphapolis, and others.