apparently the other story is ongoing and currently at volume 31 but there is no official english translation at this time. the only option would be purchasing the japanese raws online and hoping a scanlation team will pick it up :(
https://blackkodou.wordpress.com/
this scanlation group is working on volume 28
I know I have but sometimes the translation from google doesn’t always make sense I just bought the latest volume it’s the only way I can at least imagine what happened next through the pictures
Can someone update the other story it’s been years 4 more volumes are out already please