I didn't really like what most of the other sagging breasts models for anime were doing, so I compiled sample images, cleaned them up, and have started working on my own LoRA for this subject. It's nowhere near polished yet, but my preliminary result was actually much better than I expected, so I'm releasing it as a v0.5. It also tends to enlarge breasts, so large breasts become huge, and huge breasts become gigantic. Please post images and give feedback in areas that could use improvement, and I'll try to find better sample images to make it happen.saggingbreasts is the main keyword to be used in all the prompts. Beyond that, sagsit (especially in conjunction with breast rest), sagnipples, sagcrawl, and sagclothes each have their own environment to be used in. If nipples will be visible, add sagnipples. If the character is wearing clothes that will support the breasts somewhat, add sagclothes. Sagsit should be used when the character has their breast or breasts resting on an object. sagcrawl should be used in conjuction with all fours.
