On the day he received his 'attribute' diagnosis at age 10,

Light, a boy raised in an orphanage who dreams of becoming an adventurer, was granted the rare [Light] attribute, said to appear in only one out of a thousand people.

However, despite its rarity, the Light attribute was known as a 'dud attribute.'

...Because the Light magic spells learned through the Light attribute possessed absolutely no offensive power!

──Eventually, Light, having achieved his long-cherished dream of becoming an adventurer,

was training his Light magic to its absolute limits, even as he was ridiculed as a 'parasite specialist' and a 'walking torch.'

And then,

when he reached Lv 9 of the [Light] attribute, nearing the level cap──. His childhood friend Saya appeared before Light, who, thanks to his arduous training, now possessed immense magical power, and requested he accompany her to an AAA-difficulty dungeon...

He would only learn later that this would be his worst expedition...

※　※　※　※　※　※

Expect a lot of screaming.

A whole lot of screaming.

※ The plot takes a wild turn around chapters 11-12 ※