Lin Chen has always felt that Su Xiaoran, the sister brought by his stepmother, is the biggest bug in his life - obsessive-compulsive disorder and nosy, she is simply a walking complaint machine.
Su Xiaoran also believed that Lin Chen, her stepbrother, was the most outrageous accident in her career as a top student - he was slovenly and venomous, making him look like the sixth child in the world.
They were reunited brothers and sisters who hated each other, but due to a drunken accident, their souls were exchanged and they took over the magpie's nest.
From then on, the aloof academic girl was forced to learn how to play games, deal with gay friends, pretend to be an otaku and memorize formulas in tears, and deal with social life during menstruation.
In the daily life of cheating, acting, and hiding from each other, the tough-mouthed boy and the soft-hearted girl gradually understand each other's tenderness.
It turns out that the best siblings start from hating each other and end by protecting each other. The whole process is relaxed, funny and full of sweetness!