I found the ended the ending to stress suspension of disbelief too. This may be more common on one shots, which have less time to do setup. In this case, we see very little from the Marie's perspective. Marie seems like she really cares about and understands Kei because that's how Marie sees her.
As I've thought about this more, the implication seems to be that Kei does not understand love. Romance Code is stated to have the ability to develop new emotions, which clearly includes negative ones. This means it can include emotions Kei never experienced, given she did not love Marie.
Since Kei has been supporting Marie and putting Marie first this whole time, Kei may have really thought that Marie would do so again. The version of love Kei received was one where anything that adds to Kei's happiness was congratulated. Even if Marie is sad about the relationship ending, this can be "fixed" by removing the Romance Code, so Kei wouldn't feel like she is causing Marie to suffer. Kei therefore may have not been expecting serious resistance.
If I think about this way, it removes the most serious objection. Can a genius researcher really screw up their work flow so much and not shut down the robot first? Yes, if the researcher's EQ is garbage and the robot has the deeper experience with love. Otherwise Kei is believable, as a lot of people are really this selfish where they would string someone along and then cut them off as soon as they found someone they liked more.
People like Kei with an immature understanding of love often behave more selfishly as well, because they prioritize what they want or feel is lacking in their life over what they can do for another person. You see this even in people who are otherwise decent people and don't behave like sociopaths. Maybe the execution is a bit forced to fit into the one shot, but the author may used some type of observation or experience like this as the basis of the story.
Edit: Maybe also there's an element of the "We're both girls, you couldn't have believed this would last right?" trope where the person leaves them for a man and MC is traumatized? This started when Kei made more friends and the like, who would find it strange if Kei married a robot she made. Therefore Kei may have been wanting a more socially acceptable relationship, which maybe lesbians are fully accepted in the sentient robot future time span for Japan or wherever this takes place.
last edited at Jan 27, 2026 7:25PM