You Are Umasou
is a Japanese picture book series by Tatsuya Miyanishi, published by Poplar. The series has spawned an animated film and anime adaptations. The fourth film My Tyrano II: Easter, Garden was planned to release in 2024 but was delayed to 2025. Plot (based on the film) In the Late Cretaceous Period, a female Maiasaura finds an egg and adopts it as her own. She takes it to her nest near Egg Mountain, a volcano with a giant egg shaped rock. One day, a marauding pack of Troodon attack the nesting grounds, snatching and eating the Maiasaura eggs. The mother loses all but two of her eggs, one of which being the egg she saved. When the eggs hatch, one is a male Maiasaura, whom the mother names Light, and the other is a Tyrannosaurus, named Heart. The herd leader plans to kill Heart in order to prevent him from eating anyone when he gets older, but the mother Maiasaura stops him, arguing that he is a newborn and harmless. The leader gives her the chance to leave him in the wild, but she feels guilty about abandoning Heart and decides to leave the herd and raise her children by herself. Years later, Light and Heart live in the forest with their mother, safe from predators and free from the herd. Heart is unaware of his carnivorous nature and can only eat berries. While they are playing, Heart and Light fell from a cliff into a swamp, where they meet a sloth mother singing a song about tyrannosaurs and describing their appearances. The sloth sees Heart and retreats in fear, while Light jokes about the appearance of Heart, saying that he looks like the description in the song. His words make Heart sad and he starts crying. When their mother finds them, she forces Light about to apologize. Although Heart asks their mother to not blame Light, he begins to question things internally. As Heart is unable to live by eating plants and can't sustain himself of berries, he travels outside the forest and into the plains to look for food that he can eat. He sees a Triceratops fighting a pack of Tyrannosaurus, one of which is impaled by one of its horns and killed. Suddenly from the mist enters Baku, a particularly large Tyrannosaurus with a scar over his right eye, who slams the Triceratops to the ground, killing it. After watching the pack eat the corpse, Heart panics and tries to retreat quietly to avoid being eaten as well. However, one of the Tyrannosaurus, Gonza, notices him and that he smells like a herbivore. Baku asks him about his family, and Heart fearfully answers that he has a brother and a mother, not telling that they are Maiasaura. Baku explains the lifestyle of a predator, which makes Heart flee in panic, without noticing that Gonza is following him. After rejoining Light, Heart tells him disdainfully about his experience with the Tyrannosaurus. Gonza arrives and threatens to eat Light.