A baby born into the prestigious magic family, Blazel, is abandoned near the Forest of Demonic Beasts due to low magic aptitude.

A mere infant, left unattended in the dangerous Demonic Forest, surely couldn't survive... or so one would think, but,

"Auwauwaa— (Seriously? I was abandoned right after reincarnating.)"

――Actually, that baby was a Great Sage in his previous life.

Despite being an infant, he easily survived the Forest of Demonic Beasts. Leaving the forest with his beloved staff, Lindworm — which he used in his previous life — as his companion, he decides to live as an adventurer, seeking freedom.

"Adventurers are the way to go, yeah. It's carefree."

"Do you really think a mere two-month-old infant can register as an adventurer, Master?"

"It'll be fine. I can speak properly, after all."

"…That's not the point. Shouldn't Master learn more common sense?"

Eventually, becoming the world's first 0-year-old adventurer, he continued to astound those around him, sometimes legally wailing like a baby.

※This work is also published on Kakuyomu and AlphaPolis.