They are destined to walk on completely opposite paths. The cold barrier of missions stands between the two of them, with black and white in opposition and clear-cut boundaries, where meeting should naturally mean a clash. Yet, secret encounters pull at their heartstrings time and again, and restrained emotions grow wildly in the bustling city. Separated by factions and misunderstood by the world, countless obstacles block the path ahead, but souls that are ultimately contradictory fit together deeply, willing to cross all chasms to rush toward the divergent appointment belonging solely to the two of them.