Kiyoshi Yoshida

Lu Xiao and Meng Yao, classmates at a university in Jiangnan, fall in love at first sight. Yang Yu, who has long pursued Meng Yao, shares a close bond with Lu Xiao over their love for basketball, while Zhu Na passionately chases after Lu Xiao. As these relationships unfold, a mysterious figure quietly intervenes, sparking a series of events that entangle them for the next twenty years.

Beyond the human realm, there is a magical race of beings who control the tides and the changing of the seasons. One of these beings, a young girl named Chun, seeks something more—she wants to experience the human world! At sixteen, she finally gets her chance and transforms into a dolphin in order to explore the world that has her fascinated. But she soon discovers that it's a dangerous place and nearly gets killed in a vortex. Luckily, her life is spared when a young boy sacrifices himself to save her. Moved by his kindness and courage, she uses magic to bring him back to life only to learn that this power comes at a serious price. On a new adventure, she’ll have to make her own sacrifices in order to protect his soul until it is ready to return to the human world.

When 17-year-old Makoto Konno gains the ability to 'leap' backwards through time, she immediately sets about improving her grades and preventing personal mishaps. However, she soon realises that changing the past isn't as simple as it seems, and eventually, will have to rely on her new powers to shape the future of herself and her friends.