It was a short one shoot story

The story starts with a blonde haired woman who has short hair and cool + cold looks, she was going in the war, equipped with a long lance + riding a horse. Then in the other side, there's a long red haired girl who also riding a horse and had this long lance weapon.

The setting was in medieval era, where there's a knight order or something.

The blonde girl and red hair girl was an enemy , basically both of them charge with their army and stab each other.

The scene then going that the war ended, and there'a a huge pile of mountain corpse lying around. Two body emerges it was the short hair and long hair girl. Both of them had many sword/spear pierced on their body.

Basically the red hair told her that "hey you are immortal too huh, it's a good way to pass the the time right " ? the short hair reply " yeah".

In the end both of them start travelling together.

then there's time skip

in like snowy country like in russian country setting and there's a war again(i think it was world war)

both girls was wearing a military outfit, the short hair girl was sniping a tank or soldier at far away while the long hair girl was beside her and say "shoot it" and say " nice shoot" when the short haired girl hit the target.

After that there's another time skip, where both of them was standing in front of the grave and the long haired girl say "Well another person who knows us has die". Then the long haired girl started to go and say " i think it's for the best that we go separate way" and the short hair girl say "are you serious ?" the long haired girl then say "we are immortal , we will meet again in another time"

time skip.... again and in the school, a student girl come to the principal room.

the principal was the short blonde haired woman, and she was smoking many ciggarates

the student girl then say "please don't smoke in the room , principal"

the short haired woman say " haha it's okay, btw i just thinking about someone, it's about a guy who i meet for the first time, wanna hear the story ? "

sorry for the long story