An amnesiac survivor of an interstellar battlefield, a loyal dog assistant who disguised himself as a cold-blooded heir in order to survive, accidentally triggered the hidden "system" in his brain - it turned out that he was not a little white rabbit, but a high-dimensional observer who had used the "sophon system" to attack targets. And that strategy ended with his own death. Now that the timeline is reset, he must take all his memories and fall in love with the person who killed him again.