The song 赤道小町ドキッ (Equator Girl Dokki) by 山下久美子 is a catchy, upbeat tune that describes the intense passion and heat felt by the protagonist towards their love interest. The opening lines "DOKI DOKI DOKI DOKI" can be interpreted to mean the pounding of the protagonist's heart as they see their love interest walking towards them. The lyrics are filled with vivid imagery of the hot summer sun, the shimmering heat waves, and the bright colors of the world, all of which contribute to the extreme feelings of love and infatuation.

The protagonist is described as a "赤道小町," which can be translated to "equator girl." This term is used to describe a girl from a warm tropical climate, where the sun is always shining and the temperature is consistently hot. The lyrics suggest that the protagonist embodies the qualities of this term - she is adventurous, passionate, and bold. The protagonist's gaze is compared to a "夏の写し絵" (a painting of summer), further emphasizing her connection to the hot season and her love interest's intense attraction to her.

The lyrics also touch on the fleeting nature of youth and the importance of living in the moment. The protagonist reflects on the fact that time is passing quickly and that the memories made in the present will soon become just a "描かれた 残像" (faded image). This further adds to the urgency of the protagonist's desires and the intensity of their love.