MTL - HP Dear Miss Freak - Chapter 196 One hundred and eighty-six, sister and sister

The main character Lei Yu does not have the ability to practice his family’s martial arts. He gets stepped on and tossed around. Due to certain reasons, he leaves the family, coincidentally gains an ability, and makes his own path to becoming an immortal.

- Description from Novelupdates

Like every (Isekai) protagonist, I got reincarnated after getting hit by a hyper-speed truck.

That was an empty and dark life anyway, so I was already looking forward to a decent, unknown afterlife.

But... the world had a unique thing in mind.

In this new world, I had parents, amazing ones at that.

My father was a talented mage, and my lovely mother was a sharp and cunning merchant.

Ignoring all of my weirdness, they loved me unconditionally.

This was the life that anyone would love.

Eating and cooking delicious food, practicing archery and magic, and playing with my parents.

Everything was wonderful until... those demons separated us and it left me in a ferocious forbidden forest, just to be eaten alive by beasts.

But dying wasn't even a question.

I will go back… to them.

The notorious imperial court lackey and the meritorious military general were well-known for their mutual dislike, a pair of arch-enemies set in stone. Who could have foreseen the unexpected change in the winds of heaven: the general injured on the battlefield, both legs disabled, and even forced by the emperor to marry his nemesis.  

With one marriage edict, two people with mutual hostility are forced to marry and live under the same roof. Yet after these long days together, they come to the realization that this fellow is not truly devoid of any saving grace/unattainable and high out of reach.

- Description from Novelupdates

After experiencing heartbreak from being abandoned, he enlisted in the military.

And then, he became a war hero.