My egg was precocious.

In that world, everyone is born with an egg, and they hatch it by giving it their own magical power, using it as a guardian beast. In such a world, a boy named Yuto hatches his egg at age 10, when it's normally supposed to hatch at age 15. While the long-awaited hatching of his guardian beast is joyful, being an exception comes with its own complications. What path will Yuto and his guardian beast walk? A leisurely record of walking together with a pet. It has been completed. Thank you for reading. Since I felt like writing, I wrote a side story touching a bit on Mina and her guardian beast. It's here → http://ncode.syosetu.com/n4120by/ Added a story about what kind of interaction the Great Blind Beast, Petan, and Yuto had around 9 AM on 5/15. Since it's supplementary material, I'm posting it as part of the main story rather than as a side story. I also posted it on Pixiv to apply for the Mirai Shosetsu Grand Prize being held on Pixiv. The version published there is a revised edition with some adjustments, such as changing numerals from Arabic numerals to Chinese numerals and making minor modifications for inclusion in a doujinshi.