Boku No Hero Academia: Suiva Clementia

In the world (of Terra), Quirks are inhuman abilities each with its own power, and 80% of humanity is born with it. It all long ago started in the town of Qing-Qing, China, with a baby who was able to radiate light. Soon Quirks became apparent within others. Today, those who born with Quirks become great figures in society. They become heroes. However, due to the existence of Quirks, villains have become even more dangerous, which is why heroes exist.
However, that world isn't the only dimension in existence. Connected to it lies another mysterious, ancient dimension, who's existence will be revealed.
The generation of the present era will impact history and change the world like never before, while facing threats like never before.
2 beings, a boy born Quirkless and a amnesiac depressed girl with the power of songs and greater forces by her command and will, shall meet and form new bonds with others to become a powerful generation unlike others, possibly even surpassing the No. 1 hero All Might, and his actions in history. Those from the other world and humanity will meet each other, drawn together by the prayers of the girl with songs. But will this change history for the better, or for the worse? And will they have the power to overcome the evil before them? Join Izuku Midoriya and Altheumelia Edeli Precielm on their adventures to become a hero and forge history further.

I do not own Boku no Hero Academia nor its characters. I own my OC Altheumelia in this story. This book will have elements of from other universes: Ar Tonelico, Skyrim, Dragon Age, Ar/Ciel Nosurge and Fairy Tail, but this is not a crossover.
Various x OC x OC2s
Warning: Depression, gore, suicidal thoughts, Mature Language/Swearing, Sexual Content and violence. If the mentioned warning elements are what bother you, then please do be careful.