[3] "A or B" was used in televised commercials for Kao's liquid fabric softener "Flair Fragrance", starring actress Satomi Ishihara.

[3] The single's artwork depicts Nakashima on a white swing in front of a soft pink backdrop.

The limited edition artwork has Nakashima in a similar position against a dark gray backdrop.

The dueling visuals are meant to represent Nakashima swinging between options "A" and "B"; imagined here as the "rain" and "shine" dispositions of a woman in love.

[4] CDJournal critics noted that with her last two singles, Nakashima has been successfully shedding her "diva" image.