first-time GL recs

If you had to choose one non-explicit manhwa/manga to introduce the concept of lesbian attraction to someone who has no frame of reference or understanding of it, what would you suggest?

specifically looking for sfw gl for my very conservative sister, something with a focus on emotional depth and the specific social/internal experience of being gay (obviously a single read cannot be truly comprehensive, but still, you get the point!)

thank u lesbians…have a yuriful dayヾ(❀╹◡╹)ﾉ~