This is the second volume of "1×1/2 -Ichito nibun no ichi-" "old edition," published at COMITIA from 2016 to 2020. It is a yuri manga themed around the romantic relationship between biological parents and their children. Please note that the content overlaps with the currently published new edition, so be cautious when purchasing (the new edition, which includes additions and revisions to this story, is currently in production and being published periodically).