Oyoso 100 Nen Yuhei Sareteita Majutsushi Fufu wa Sekai o Meguru

Emilia, a noble's daughter, possesses a unique constitution: despite harboring thousands of times the mana of an ordinary person, she is utterly incapable of casting a single spell.

Deemed a danger due to the risk of a "Mana Outburst," she was imprisoned in a castle the day after her sixteenth birthday. Sealed behind a powerful barrier, unable to leave or receive visitors, she spent her days in monotonous solitude.

However, one day, accompanied by a deafening crash, a magician arrived at the castle claiming to be her fiancé. Clad in the robes of a State Magician, the man—named Alan—declared: "I am your last fiancé."

Bound together by unavoidable circumstances, Alan and Emilia set off on a journey around the world to discover a path for their future. After many encounters and farewells, what fate awaits the two of them at the end of their road