A baker by day and demon fighter by night, Zhong Kui, a reincarnated deity must jog his amnesiac lover's memory of their millennium-long romance.

Two teachers hold polar opposite viewpoints about teaching and life. Wang Qiang-Da is a genius Professor of Mathematics who approaches everything in front of him with logic and reasoning. Wang Qiang-Wei is a history teacher, art appraiser and “Dorothy” on “Sophie’s Midnight Sky” radio program. She cares about the love of learning and making people happy around her. Qiang-Da and Qiang-Wei are brought together during a crime bust for the “Black Ghost” which goes wrong. Both end up teaching at Chang Tai Tutorial Classes and helping Prosecutor Tie Bu-Fan solve cases.

If you had a second chance to correct the biggest mistake of your life, would you take it? Alice (Nikki Hsieh) is a cold, 30-year-old woman who lives her dull life like a robot programmed to do the same things everyday. But her boring life changes when she wakes up one day to discover that she has returned to her 17-year-old self! Back in high school on the day of an important swim meet for her best friend, Shu Lei (Amanda Chou), Alice literally runs into the moody He Hao Yi (Lego Li), who has just transferred to her school. Hao Yi mistakes Alice for his long-separated twin sister, and because of a grudge against her and his mom, Hao Yi decides to torment Alice at every turn. Meanwhile, Han Ming (Edison Wang) is a nerdy student who has long harbored a secret crush on Shu Lei. After a few mishaps, Hao Yi realizes that Alice is not his sister, but will Alice take this opportunity for her to correct her biggest mistake with her first love and change her own future destiny?

Could anyone be more excited to reach her 25th birthday? Pi Yanuo had an inauspicious start to her life. Doomed to live her life as a boy, Yanuo is shy and always tries to keep her distance to people to hide her true identity, and the mysterious aloofness makes her irresistible to the girls around her. With her 26th birthday fast approaching, will Yanuo find her much-anticipated return to being a female will be as easy as she had hoped?