This is just remind me that this is the first time that elf race almost extinct not because they were hunted but because their instinct to have children is so low thanks to their long life.
The reference that i found.
Mario mushroom and gumba, pokemon pikachu and poke ball, doraemon copter, batman, picolo, spider-man,dragon ball, and reference to Gaara third eye.
Every time the manga i like end even with happy ending, there always some kind of empty feeling, knowing your manga that you use to wait will never update again.
Thank you for the translation, have a nice day and stay save.