Back Twenty Years with My Archrival

After Gu Yun bumps into a utility pole while walking, she opens her eyes and finds herself twenty years in the past. She pats the three layers of fat on her belly and becomes the chubby little girl she used to be. Gu Yun used to be timid, and was often picked on by her sharp-tongued, domineering class monitor. Back in elementary school, Gu Yun has only three things to do: study hard, take revenge, and act like a fool. When the class monitor is drinking, she squeezes his bottle and splashes water all over his face. As he glares at her in fury, she makes a vacant expression and runs away. When the class monitor is spacing out, she holds a huge rat up in front of him. As he stares at it in terror, she looks at him as if waiting for praise. When the class monitor plans to make a fortune by buying lottery tickets, she reports him, then grabs his hand and holds on tight when he tries to run away. Or, when the class monitor forgets his lunchbox, she hands him a basin. Everything goes smoothly. Gu Yun studies hard and becomes a top student, earning admission to a prestigious middle school. She works hard to lose weight and becomes a cute school beauty. Only one thing goes wrong: her former bad-tempered nemesis shows her a strange degree of tolerance. Not only does he let her pranks slide, he starts following her around all day, and even tries to secretly hold her hand. How infuriating! - When Ming Zhi walks into the meeting room, he bangs his forehead on the doorframe. He opens his eyes and finds himself back in elementary school. He used to be domineering and sharp-tongued, and that slow, chubby little girl gave him no end of trouble. Back in elementary school, Ming Zhi has only three things to do: daydream, get rich, and drink more water. Everything goes terribly wrong. That chubby little girl squeezes his bottle while he drinks, giving him a face full of water. When he gets bored and zones out, she cheers him up with little animals. When he buys lottery tickets, she grabs him and begs him to turn over a new leaf so he won't ruin his chances of becoming a civil servant someday. She really has been clumsily looking out for him all along. So Ming Zhi follows the chubby girl to her middle school. He not only sticks by her every day, he even eats out of the basin she gave him, with absolutely no shame! - One day after school, Ming Zhi takes Gu Wen's hand.