Reincarnated as a goblin, but his mother is a white-haired elf?

Ye Yan, an orphan without a father or a mother, was chosen by an assassination organization.
Become a killing machine with no emotions, only knowing how to kill and obeying the orders of "Mom".
The chief of the assassination association.
Then, because of fear of Ye Yan's talent, he was assassinated by his "mother".
Unexpectedly, he was reincarnated into another world and became a child of an elf, but something was wrong with the place...
Look at the goblin cubs jumping towards their mother.
Ye Yan did not hesitate and killed the other monsters that approached the elves.
Then, looking at the red-eyed, white-haired elf loli in front of him, he asked:
“Are you my mother?”
...
then.
The assassin whose extra emotions were wiped out and whose eyes were only focused on his mother.
A white-haired elf who was abandoned by his companions and captured by goblins.
"Met" in the Goblin's Lair. ...