The aloof and abstinent antique master × the weird plant spirit
An aloof and ascetic antique restorer picked up a pot of withered "green plants", but unexpectedly it turned out to be an endangered plant spirit ancestor who was a talkative man and wanted to bask in the sun and recharge his batteries (to absorb emotions). Living together, they were having a lot of fun, catching monsters and solving cases, until one day, he used his own blood ink to draw a symbiotic contract with him.