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...
We must settle this matter 
beyond a shadow of a doubt!
!علينا أن نقطع الشّكّ باليقين في هذه المسألة
Wir müssen diese Angelegenheit klären,
um Gewissheit zu haben!
Voyons qui de nous deux
est le plus fort !
Dobbiamo chiarire questa cosa 
oltre ogni ragionevole dubbio!
Precisamos resolver isso
de uma vez por todas!
Мы должны решить
всё раз и навсегда!