Azusa Aizawa, a 27 years old woman, died on work site due to overworking. She has the possibility to reincarnate, and so she plans to live a chilling and calm life. But will she be able to be relaxed?

Middle-aged businessman Ryoma is reincarnated in a magical world by three gods. He's a child again, and he spends his days with his tamed slimes.