I Think I Really Am Gifted!

Fragments from a higher dimension arrived on Earth, ushering humanity into the age of magic.

First, a witch barged into my room on a rainy night and made me sign a contract with her!

Then my computing power skyrocketed, letting me learn all kinds of rune spells in an instant!

After I met a holy knight,

I somehow gained the power of holy light, too!

Gradually, I grew so strong that even I could barely understand my own power.

PS: An overpowered protagonist, lighthearted story, one female lead