Characters who engage in a relationship because it’s easy, fits their current lifestyle, or provides a certain level of comfort without the demands of a traditional commitment.

: While not "convenient" in a sexual sense, it heavily critiques the idea of "convenient" social labels and superficial high school relationships. or a review of a particular adaptation like the anime or the original visual novel? Tsugou no Yoi Sexfriend? (Video 2012) - Plot

The relationship lacks the messy responsibilities of a formal commitment.