3 Disdain and Determination

It had been a year since Ren had last found out what his affinity to the base elements of ninjutsu, but as he grew the difference between him and Itachi kept on growing. As such everyone in the family tended to favor Itachi more and everyone's treatment besides for Itachi and Mikoto grew more and more cold for Ren.

"Look, its those two twins, despite being fraternal twins one is mediocre at best while the other is a genius" Someone whispered to another person.

"Ren, don't listen to them, they don't know anything."

"It's okay, I will become a great ninja!" Ren replied earnestly

...

There was a young boy with black hair and black eyes being surrounded by 4 other children.

The person being surrounded was Ren.

"Why do you look so cocky?" one of the surrounders said

"Are you looking down on us just because your brother is a genius?" another questioned.

"No! I've never been cocky or arrogant!" replied Ren scared of getting hurt.

...

An hour later, Ren was limping home with bruises all over his face and body.

"I'll become strong and show them they never should've messed with me," Ren thought as he suddenly heard footsteps behind him. He then turned around and saw Itachi

"Ren! Are you okay? Who did this to you? I'll go beat them up for you!" Itachi claimed as he was immediately angry at the sight of his own little brother injured.

"It's fine, I'll get stronger and beat them up myself!" Ren responded silently.

Seeing his brother determined, Itachi calmed down and said: "If you need help with anything just tell me".

...

It was the next day and Ren was in the woods getting ready to train his body.

Since I have a lightning affinity, I need to train my body for the strain it causes on my body. For my body, I plan to have it strong and fast enough to withstand Chidori. It's a good thing I was a major otaku and ended up learning all the seals for most of the jutsus that were shown in the anime, with this I don't need to spend time learning the seals and waste any time.

As he continued to train his body doing pushups, situps, squats, and dashes back and forth, he could feel his body slowly become stronger and more toned as he burned off the extra body fat. (ONE PUNCH MAN!) What became days became weeks and then eventually a month had passed.

When he went home he fell into his bed and fell asleep instantly, as he was extremely exhausted from training.