I Turned into a Little One and Got Adopted

When An Yan woke up, he had become a little cub. He was in a mansion, surrounded by his fluffy little cub companions. He thought he had become a pampered pet in a wealthy family, the kind whose owner called him "my precious boy" every day. But why did pets have to learn to read? Later, An Yan [looked shocked]: I really am their son! Only then did he realize he had entered a harem novel. The protagonist, Carlos, was the beloved love interest whom all the male leads fought over, and he was An Yan's little companion. An Yan gazed at his companion, who was still a little ball of fluff, with a look of tender affection. For his companion's future, An Yan raised his soft, furry little paw and cheered him on. "Come on, run another thousand meters. Get stronger, and you won't get pushed around!" One day, An Yan discovered that he was actually the novel's beloved protagonist. He touched the cat ears on his head and trembled with fear. The one called "little kitty" in the novel wasn't Carlos the tiger. It was him, the little cat! To make sure their future was peaceful, he had to work hard. Carlos stopped the little cat, who was sweating buckets from running, and handed him a bottle of milk. "Be good, Yanyan. Sit and watch me run." An Yan: "No. If I'm too weak, I'll get bullied." Carlos lifted an eyelid. "Do you think I'm dead?" From elementary school through college, all of Carlos's classmates knew that An Yan was Carlos's one weakness, and no one was allowed to touch him. #Turns out I'm the beloved protagonist# An interstellar beastfolk setting, childhood friends to lovers. A cute cat-boy uke x an incredibly powerful white tiger seme. Please note: 1. If you like it, please add it to your collection. 2. This world has mpreg. 3. The author is bad at writing blurbs and may revise this one now and then, but the outline won't change. 4. Lots of headcanons. Theme: Stay optimistic and persevere in kindness and goodness. Life will be more beautiful.