Dimensional Mercenary

I think of this as the prototype where "SSS class suicide hunter" based its theme on.

It's about resolving quest but with getting happy ending for everyone. Not brute force fighting it. MC only skill in the manhwa is talk no jutsu thou. But it expanded deep into that premise. He could empathy with other and made other empathy with him. The more his skill expanded the more it became the kind of detective and persuasion tool. So this has lots of talking. There are people who do the action ofc but it just not MC.

MC only strong point is empathy. That talent materialized into a skill when he became worker for otherwolder company. And that's how he became the most suit for his job. His job as a worker for otherworlder's god company, where he would do quest to resolve the regret of the people who sold their soul to that god. His seemingly useless skill comparing other worker turned out to be what made him resolved the soul regret at the highest grade because he did not only did the objective of the quest to get the soul what they asked for but also did it in the way the soul wanted the most because of his empathy with their mind.

The guy on the cover is a recurring character in almost all his quest. A real isekai'ed guy into the world of the god MC worked for, where MC had to periodically do quest in.