"Despite my origins, you were not afraid to accept my helping hand. Now, Conductor, that you are able to soothe my distorted melodies ... will you bring harmony to me? I will vow to learn your language and customs, serve you and protect you." - Yureihana Uta
Artist: @KYHSoren
As someone who includes YAB/Rue S/M/L.
It's not because people hate small tits or less curvy bodies. S has different weights, and a significatively different shape compared to M and L. It takes more work to scale to it and less people use it.