Aizawa Azusa, a corporate drone who died of exhaustion from overwork in her previous life, is reincarnated in another world, where she decides to live out a slow and uneventful life forever. But then, 300 years later, she discovers that the experience she earned by defeating slimes every day just to keep up her easy lifestyle has brought her to level 99 and made her the strongest in the world. The rumors begin to spread, and soon trouble comes knocking...
Didn't you promise me you 
wouldn't tell anyone?!
!ألم تعديني أنّك لن تخبري أيّ أحد؟
Hattest du mir nicht versprochen,
keinem davon zu erzählen?!
¡Prometiste no decírselo a nadie!
¡Prometiste no decírselo a nadie!
Vous aviez promis
de n’en parler à personne !
Non mi avevi giurato che non l'avresti detto a nessuno?!
Você não prometeu que
não contaria a ninguém?!
Не ты ли обещала,
что никому не расскажешь?!