This is a whole genre basically. Do you have any more specifics? Like relationship type or what the characters looked like?
This is the basic premise of just about any guideverse story.
This is a list of guideverse stories, but it doesn't look like any of them are specifically manga : /
https://www.mangago.zone/home/mangalist/448197/
https://www.mangago.zone/read-manga/b_class_guide/
Is it this one?
Yeeees!
Hey everyone, in the past I read a manga but I cannot find it anymore, maybe you guys can help me it was about:
Special ranked people who had powers to kill monsters, but they had the possibility to overload and to keep that down they needed to touch other people which they had a high compatible rate with.