It's Not Easy to Be an Elf Daddy

One day, Zhang Tian received a strange express delivery. When he opened it, he found a cute loli inside, and she called him Daddy. Zhang Tian was confused, I am still a virgin, where did I get my daughter from? What made Zhang Tian even more confused was that he gradually discovered that the cheap daughter he picked up was not a human, but an elf! Ahhhhh! Did he become the elf's daddy just like that? I'm not ready yet!