I love the premise and the art so so much!! A Detective who can see ghosts and an immortal soul collector who values his work-"life" balance (I laughed at that one so hard!!) is such a fun concept!
If I can advise anything it's to err a bit more on a side of "show" vs "tell": describing Detective's emotions and mental state vs them saying it out loud can help strengthen the prose. Please do not take this as a critique tho, just an ounce of feedback