TV-Series
Description
After dying in a traffic accident at twenty following his parents' deaths and leaving university, Ryō Mihara accepted reincarnation into the fantasy world of Phi from the entity Michael. He specifically requested a secluded life, resulting in rebirth on the isolated Rondo Forest subcontinent. Michael withheld two critical attributes: Ryō's exceptionally vast magical power and the rare hidden trait of Eternal Youth occurring once every ten thousand years.

Physically, Ryō retains the appearance of a teenager despite living over twenty years in Phi, sporting black hair, black eyes, and slightly tanned skin suggesting outdoor activity. His East Asian features are often called cute by others, and he stands significantly shorter than his companion Abel. The undisclosed Eternal Youth trait prevents any physical aging.

His personality blends optimism with analytical thinking shaped by university studies in Western history, leading him to frequently reference works like Machiavelli and Shakespeare. A strong fascination with classic fantasy tropes and science fiction concepts influences his behavior, sometimes confusing others. He cherishes coffee and culinary experiences, exhibits competitive tendencies against fire mages whom he openly dismisses, and shows admiration for wind magic.

Ryō's magical abilities focus exclusively on water manipulation, amplified by applying molecular science from his previous life. He trained through survival against aquatic creatures and battles against assassin hawks, a headless knight emerging from a marshland lake, and demons. Though lacking offensive power compared to elemental counterparts, his defensive water techniques achieve unparalleled effectiveness. His swordsmanship developed sparring with the headless knight and later refined with wind magic user Sera. In Lun city, inheriting notebooks from another interdimensional traveler sparked alchemical expertise, resulting in creations like the submarine "Londo-Class No.2: Neil Andersen." His equipment includes the Murasame sword and a spell-blocking robe gifted by the Water Spirit King, earning him the epithet "Favored Child of the Water Spirit King." He naturally emits "Fairy Drop" and "Fairy Factor," substances visible only to elves and demons, potentially linked to his Eternal Youth.

Ryō's story unfolds in distinct phases: twenty years of solitary survival in Rondo Forest honing magic through monster encounters and mastering self-sufficiency; discovering the shipwrecked swordsman Abel triggers departure from isolation. Their journey introduces human civilization at the Naitorei Kingdom after traversing monster-infested terrain, where Abel recognizes Ryō's combat superiority despite Ryō's self-perception as ordinary. Registering as a C-rank adventurer in Lun city, he rarely undertakes guild work, maintaining low status despite acknowledged power. He forms connections with novice adventurers Nils, Eto, and Amon while pursuing alchemy. Key conflicts include battling demon Leonor in a sealed corridor and confronting a "Great Tsunami" dungeon event. Later arcs expand his impact across Phi's Central, Western, and Eastern Provinces, involuntarily thrusting him into historical events.

Significant relationships include his unresolved frustration toward Michael for omitting the Eternal Youth truth. Abel serves as both travel companion and reluctant bridge to human society. Sera becomes a regular sparring partner developing his swordsmanship. The Water Spirit King functions as mentor and benefactor. Among adventurers, his unassuming C-rank status contrasts with those recognizing his true capabilities.