Responses
You can check the missing chapter on Mangadex and i bought this manga a few years ago where the author mentioned that she actually won a competition or debuted using the first short. It was sort of a pitch to the story
And now that i think about it, the 1st chapter is like a remake or like, a diff artist was drawing it so no wonder the 1st and 2nd chapter has the same plot. The original chapter starts from 2nd until the end chapter. But they missed out the original 2nd chapter about the twins' classmate that hate their relationship bcs she's still suffering from the lost of her baby brother due to car accident. It was sad when the brother's spirit would visit the sister in the classroom until the twins realized it.