This is volume 9 of the "old edition" of "1×1/2 - Ichi to ni bun no Ichi -" published at COMITIA from 2016 to 2020. It is a yuri manga themed around the romantic relationship between biological parent and child. Please be aware that the content overlaps with the currently published new edition when making a purchase (the new edition, which includes additions and revisions to this story, is currently in production and being published regularly).