I was left by my master in the sunken underwater city and waited for 1897 days. Just for the words "I will come to pick you up when I hear a whale singing". Until military scavengers uncovered the truth: the whales were extinct long ago and their owners died three years ago. And the military android who came to remove my chip was, like me, waiting for someone who would never come.
Concept: The bionic companion doll who was promised by his owner to "take you home when he hears the whale singing" and stayed in the sunken city, while waiting for the energy to run out, met the "scavenger" military bionic man who came to recover the chip. When lies and truth explode in the high-pressure deep sea, she must choose between "obeying instructions" and "becoming herself."