Picking Up an Egg [Interstellar]

Old story, read at your own risk. Don't read. Jiang Beiqi had a life full of misfortune. After a car accident, he unexpectedly became reborn, and from then on, he embarked on the path of being a dad. But the road to fatherhood was full of hardships: He picked up an incredibly black egg. And when it hatched, a "little monster" emerged, following him day and night. Then one day, the little monster changed... Not only was it taller and more muscular than Jiang Beiqi, it had also fallen for him! Theme: Life as a reluctant dad