You Just Graduated from College and You Want Me to Get Rid of the Evil?

Chen Yan, who just graduated from college, accidentally bound to the "Hundred Ghosts Illustrated Book" system. He can gain abilities and bonds by absorbing ghosts. Forming bonds with similar ghosts can strengthen himself. [Absorb "Yin Soldier (Remnant Soul)" [The bond "Yin Soldier Queue (5/5)" is completed. Effect: Strength +5, Constitution +5, acquired skill "Yin Soldier Evil Aura (Elementary)" - exudes weak evil energy, which can scare low-level ghosts. Track down the source of the ghost's troubles and help him realize his wish. At the same time, he uncovers the secrets of himself and the copper lock pendant to fight against the ultimate evil existence. Become an official "Boundary Keeper", with the copper lock and the bonds of ghosts, continue to walk between Yin and Yang, deal with new weird things, and protect the peace of the world.