This is the first volume 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 "romantic feelings between 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 periodically).