After being reincarnated as an immortal witch, Azusa has been defeating slimes for 300 years and has unknowingly become the strongest in the world. She was supposed to continue her slow life with the ambitious dragon Laika and her cute daughters, Falfa and Sharsha, but more troubles arise as her second disciple, the elf Harukara, and the demon lord Beelzebub show up...!? This is the number one selling title in GA Novel history, a heartwarming comedy from the "Shousetsuka ni Narou" platform!