People from two worlds can be friends, enemies, or pass by each other, but if they fall in love, they will only end up with the fate of extinction. Just like a bird falling in love with a fish, they desperately want to stay together, but they end up harming each other and destroying themselves. However, the more different the two people are, the more they are attracted to each other, and the more difficult and obstructive the environment, the more desperate they are. Love without hesitation is not only heartwarming, but also heartbreaking. However, all this can only be understood after the youth of life has burned out.