The One I Love was developed by
Clamp—the all-female,
manga artist team consisting of
Satsuki Igarashi,
Mokona,
Tsubaki Nekoi, and
Nanase Ohkawa. The group decided on the theme of romance after considering the target audience of the
manga magazine Monthly Young Rose, whose editors had asked them for a manga. For
The One I Love, Ohkawa wrote the essays, and Nekoi illustrated the manga, the first time she primarily illustrated a series for the group. For costumes, Ohkawa used "Anon non-no Olive" as a reference. Additionally, the preview panels of each story featured different
visual motifs, primarily girls and animals. In retrospective, Nekoi
self-deprecatingly thought that her illustrations of the female protagonists, including working women, made them resemble
junior high students. Some of the stories in
The One I Love contain autobiographical elements. "Different" and "Cute" draw on Ohkawa's personal experiences, while "Together" draws on Mokona's. Additionally, "Suddenly" is based on her admiration of manga artist Hagiwara Kuzushi's dedication to his fans. "Normal", "Apart", and "Insecure" were inspired by Ohkawa's conversations with friends, and "I Miss You" has its origins in a conversation with manga artist Okazaki Takeshi, who rarely saw his girlfriend because of his work. "A Younger Man" stems from Ohkawa's conversation with actor Tonesaku Toshihide and his thoughts on men and age in a relationship. In contrast, "Courage" appeared as a Valentine's Day story in the February issue of
Young Rose; Clamp rarely had opportunities to create seasonal stories, as the magazine that typically serialized their work did not run seasonal stories. ==Release==