Seiken Tsukai no World Break
How about a translating a complete series also known as World Break: Aria of Curse for a Holy Swordsman
Description is something like this:-
*Written by Akamitsu Awamura, the series takes place in a private high school involving the concept of “saviors.” They are known as people who possess awakened memories of their past lives. The story tells of a young boy named Moroha Haimura who comes to this private school.
At the school, there are two types of people: Shirogane, who fight enemies with weapons and techniques gleaned from the Prana powered from their own bodies, and Kuroma, who wipe out enemies with magic to manipulate the Mana powers that surpass physics. Moroha Haimura is the first person with past lives of both Shirogane and Kuroma.*
And it didn't have any major fan translation and also had a anime in 2015.
There is already a topic for this series, you can upvote the first post there: https://forums.j-novel.club/topic/1279/seiken-tsukai-no-world-break-world-break-aria-of-curse-for-a-holy-swordsman