One is a seabird-like existence, free, proud, and unrestrained, able to own the sky and embrace the sea; the other is a fish that wants to break through the sea, bound, cold, and swimming blindly in the sea, not knowing where the end point is. When one day a seabird and a fish fall in love, will the seabird rush into the cold seawater regardless of its own safety, or will the fish leave the water and break free from the shackles of the seawater? But no matter which way it is, there is only one final result, that is, one of the seabirds or the fish will lose everything, and even his life, for love. Yamada Aiko, this fish who can't help himself, falls in love with Chen Ziting, a seabird who can take him flying...