Parallel time, argued in clay.
Concurrency describes the moment when action refuses to wait for a single procession. A quest forks, negotiates, suspends, resumes, and still remains one quest. Its difficulty is not speed, but composition: which line is allowed to speak, which line becomes a silence, which event becomes the shared hinge.
Here the system is treated like an archaeological plan. Each trench reveals another layer of intention. The page does not smooth those layers into a seamless product story; it preserves their pressure, their overlap, and their hard-edged evidence.