Akuyaku Reijou Level 99

Villainess Level 99 follows Yumiella Dolkness, a dark-haired noble girl in the otome RPG Light Magic and the Hero. Feared by others because her rare dark-type magic is associated with the Demon Lord, she regains memories of her previous life in modern Japan when she is five and realizes that she is destined to become the hidden boss who appears after Alicia Ehnleit and the game's three love interests defeat the Demon Lord. Rather than accept the role the game assigns her, Yumiella refuses to live as the story dictates. She prefers the game's fantasy elements over its romance, so she trains her magical skills and levels up in secret, hoping to stay out of the spotlight. That plan collapses at the Royal Academy entrance ceremony, where her powers are measured at level 99, an impossible result even for the royal knights, let alone a 15-year-old girl. With the royal family requesting her help and everyone else insisting that she prove her strength, Yumiella discovers that her dream of a quiet life is no longer an option.