How many ifs are there in the world? If Caitlin was a mermaid, if she later became Gu Jingyue, if she met Wu Shixun and fell in love with her, if they would separate in the end, if this was just a lust, if... The moment we look back, we are destined to fall in love, take your hand, and our world is destined to change, so what? I love you, that's enough Wu Shixun, I love you