After Making a Contract with the Elves

How to become an elf? It's very simple, find an elf and make a contract with it. After both parties agree, congratulations, you have become an elf envoy. Then—— You will be responsible for this elf's daily life and daily food, and you will also be responsible for taking care of it, loving it, accompanying it... And staying with it until the end of its life. Emmm… It all starts with making a contract with that elf.