An unknown number keeps texting Yoon-seo’s phone with messages only an ex-boyfriend would text, making her suspect Ju-won. When she confronts him about it, she makes a fool of herself….

The end is near, and the virus is spiraling out of control. Professor Pang feels a strong sense of regret, but everything seems to be inevitable now.

Everyone thinks it’s too much when Hua Ling-long goes after Qiu Qiu. With the raging epidemic virus, the Gold Dimension might be obliterated!

While facing off with Professor Pang, Lei Ting stumbles on an unbelievable truth. Prof. Pang goes so far as to destroy the Door of Time and Space.

In order to bring King Arthur back, Wu-xiong decides to look into the memory from ten years ago. The spell imposed on Lei Ting is lifted.

Lei Ting and Wan-jun decide to face the future together. To protect the two of them, Hua Ling-long pulls a risky move.

Wan-jun decides to break ties with Lei Ting. Geng Lie saves a girl who keeps calling him “King Arthur” despite having lost her memory.

Wu-xiong tells Geng Lie about her love for him, but it only makes his heart ache. Lei Ting shows her affection for Wan-jun, who feels rather mixed.

Ling and Wan-jun work together to investigate Geng Lie. Wan-jun rushes to the rescue when a debt collection group forces Qiu Qiu to work off the debt.

The sealed memory of Lei Ting is unraveled, but the truth breaks her down and drives her to tears. In order to protect her, Wan-jun makes up a lie.

Lei Ting reveals the secret to her classmates and reconciles with Wan-jun. The class is in danger. Luckily, the new transfer student saves the day.

Lei Ting begins to see hallucinations accompanied by severe headaches. Wan-jun’s house is burned, while Ling’s tent is also being trespassed.

Lei Ting must confront the past that she has been reluctant to face; her past with Wan-jun also comes to light.

Lei Ting is unhappy. Qiu Qiu is looking for a missing item, but Ling misunderstands and discovers that there is a deeper tie between them.

Everyone in KO One tries to pull out the best tricks to help Qiu Qiu pass the test. Qiu Qiu wants to lend her ring to Ling, yet he turns…

Da-dong’s memory is in disarray. Ling reveals his identity to Da-dong and explains what has happened to him.

Da-dong gradually loses his memory. Class KO One prepares a surprise for Da-dong, who is determined to win the competition for the class.

Lei Ting decides to tell Da-dong her feelings, but someone spoils the mood. A man descends from the sky and calls Da-dong’s name before passing out.

Lei Ting finally tells Da-dong about her feelings. Wan-jun beats up Da-dong for Lei Ting, yet Da-dong seems to have changed into a different person.

Class KO One is shocked when the identity of the kidnapper is exposed. Lei Ting realizes her own feelings and those of Wan-jun.

Due to a strange combination of circumstances, Lei Ting and Da-dong are trapped on an island and forced to spend a night together.

Wan-jun feels bitter as Lei Ting cares more and more about Da-dong, who receives a bizarre warning.

The identity of the “Non-existent Student President” is finally exposed! A mysterious person confronts Da-dong and knocks him out.

Romantic feelings are growing between Lei Ting and Da-dong. What’s-his-name discovers an unknown side of his father. Xiao-jie is staying at KO One.