- **Lu Shiyu** (Shou): 27 years old, a second-hand bookstore owner on the verge of bankruptcy. He is born with the ability to hear the "heart sounds" of others, but he has been closed off to himself for a long time. Beneath the gentle and undisciplined appearance is a sharp sense of loneliness.
- **Zhou Chen** (attack): 31 years old, a folklore professor with a mysterious identity, specializing in "urban legends". His left hand was bandaged and he carried a silver pocket watch. His true ability is to "swallow memories", and he has another purpose in approaching Lu Shiyu.
Intention: Yuan Dan