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...
growing too proud and neglecting 
the need to polish my skills.
زاد افتخاري بنفسي وأهملت 
.الحاجة لصقل مهاراتي
Ab einem gewissen Punkt war ich zu stolz und
habe nicht mehr wie nötig an ihnen gefeilt.
me volví arrogante
y dejé de pulir mis habilidades.
me volví arrogante
y dejé de pulir mis habilidades.
j’ai négligé mon entraînement
par arrogance
e, resa cieca dal mio orgoglio, 
non ho mai affinato le mie capacità.
fui orgulhosa e negligenciei o
aperfeiçoamento das minhas habilidades.
возгордилась и пренебрегла
нуждой тренироваться.