Why do people do things that make them uncomfortable most of the time? In love, commitment, passion and intimacy, these three elements all value mutuality, but in crush, there is none. But the obsession of secret love is like an addiction that people cannot quit. Just like this ten-year secret love, it is rational and persistent, but it is also like a poison that makes people feel like they are facing an abyss but cannot turn back. But this bottomless abyss may also hide another paradise.