Fate/Outer Code: Type-Andromeda (Nasuverse x OP!Male Reader)

Outer Code: Over The Horizon

Once, there lived an overpowered jerk.

With white-rainbow hair and elegant black clothes, he was a young man one would glance upon once in a hundred lifetimes.

A paradox of untold horrors, born of hate, cast unto a prison of flesh. He was anything but ordinary.

And yet, this same hateful being was changed by love. 

Now at peace with himself, this young man proudly calls himself a human as he travels across infinity in search of enjoyment and adventures.

Selfish, yet philanthropic. Silly, yet wise. Ruthless, yet benevolent. Sinful, yet virtuous. He was a paradox in every way, and yet he was content.

Although he wasn't one to call himself a hero, this young man often indulged the desires of whoever wished to summon him.

In one fateful day, a lonely girl who wanted to be free of her cursed knowledge screamed for help. This cry for help carried across existence until he felt the call.

He was curious and decided to answer the summons. And thus, he enlisted into servitude of a creepy girl who was to be his Master in the Holy Grail War.

This girl was a rather intriguing case for the young man. 

Having lost the person she loved the most, this girl was willing to destroy the world for that person's sake, using her immense power and hatred for her own cursed life to fuel her quest. An attempt to free herself of the suffering that was her own existence.

He felt like he was seeing a rather warped mirror at that moment.

And so, he decided to undertake an experiment.

Since he, a being of pure hatred, was able to be changed with unconditional love... perhaps this girl could use something like that to ease her suffering.

And so, he agreed to serve under her. He remained loyal to her cause, listened to her worries, and offered the right advice he had been given in his own time of need.

In the end, the results spoke for themselves. The girl had abandoned her quest to destroy the world and merely enjoyed his company. When she accomplished her goal of reviving her sister, her transformation was complete and the experiment had been deemed a success.

Ah, love. Such a ridiculous thing could accomplish even more ridiculous and impossible things.

With his duty fulfilled and his Mistress having her happy ending, he continued his journey until he happened upon yet another pained soul with a melancholic melody as her call.

A grieving mother, who was deathly afraid of her children eventually forgetting her to the sands of time. This resonated with the young man and motivated him to soothe her worries with another experiment.

Granting her temporary freedom to her prison, he brought her to a world where her children indulged in war against each other. 

And yet, in this time of strife, the beauty of humanity had shone bright, renewing the maternal love she harbored and proving that her love was not mistaken.

With this wish fulfilled, both the mother and the young man vowed to reunite once more before the journey continued.

A decade passed before another cry for help from the same world emerged. It was the sister of the girl he had once called Mistress.

He viewed the young girl as a daughter, and she was now questioning the meaning of her existence, placing no value on herself. 

What was once a trip to fulfill his curiosity had become a genuine desire to help, as the young man did not need a reason to come to the girl's side.