Pee Khee Ngao

Venus (or Nat) is a bright-faced, spunky girl with a tomboyish attitude. She is the only daughter of Dr. Wit and the younger sister of Neptune. Dr. Wit plans to build a private observatory, so he purchases an abandoned house at the foot of a hill in Kanchanaburi.
On their first night, Dr. Wit and Neptune are "greeted" by a Little Ghost haunting the house. Instead of being terrified, the two men aren't scared at all—in fact, they prank the ghost back so hard that the poor spirit flees in terror into Nat’s room. Unlike her brave family, Nat screams the house down and sits paralyzed with fear until morning.
On her first day of school, Nat meets Tangmay, a polite girl who becomes her close friend. She also crosses paths with Karaked and Sainampheung, a duo of "mean girls" who insult her, nearly leading to a physical fight. Later, Nat is punished by a teacher and forced to stand with her arms out in front of the classroom. She accidentally falls asleep and collapses, only to be caught by Saandee, a sharp-tongued senior. Instead of being grateful, Nat suspects he is trying to "grope" her, sparking an instant rivalry between them.
After school, Nat performs a ghost-busting ritual. Saandee witnesses this and mocks her, provoking Nat into an all-out "Garlic War." When Saandee returns home, he tries to hide the incident from his uncle, Phisut, but is caught. Phisut takes him to Nat’s house to demand an apology, only to discover that Nat’s father was his senior classmate back in the United States. With the parents being old friends, the feud is settled much more easily than expected.