Mizu Zokusei no Mahoutsukai

After dying in an accident, Ryou Mihara awakens in the world of Phi with an affinity for water magic and one modest goal: a peaceful second life. Instead, he begins in an isolated wilderness filled with monsters. Years of surviving alone turn into relentless magical training, while the hidden trait of Eternal Youth allows two decades to pass without aging him.

Ryou’s quiet routine changes when he finds Abel, an adventurer stranded after a shipwreck, and agrees to accompany him to the town of Lune. For the first time, Ryou steps into the wider world of guilds, travelers, and dangers beyond his forest. He still wants to improve at his own pace, but power as unusual as his is unlikely to remain unnoticed for long.