Real Sound: Kaze no Regret is an audio game: it has no graphics or other visuals of any kind. Gameplay-wise, it is identical to visual novels, with written text and images being replaced by sound. The player listens to the voice-acted story, which is occasionally interrupted by a chime, prompting the player to make a decision and branch the plot.
According to Katsutoshi Eguchi, the two voice actors of the main characters had to act out a romantic scene concluding with a kiss. Kenji Eno made them act out the kiss for real and shortly after the two actors started dating for real...