All 3 models: Mikoto, Tooru, Yuujirou can and will add small breasts and depending on the model, normal breasts. Unfortunately I'm terrible at regulating this. You can add "1boy" or even a LORA that removes her breasts.
Commonly used models:
Hassaku: https://civitai.com/models/2583/hassaku-hentai-model
Hardcore Hentai: https://civitai.com/models/136054/hardcore-hentai-13
Noosphere: https://civitai.com/models/36538/noosphere
Matrix Hentai: (Unavailable)
Models are trained from Hassaku or Anything V5.
If you're out of ideas for prompts, how about 13886 prompts? This is what I have for you
Prompt (dataset): https://files.catbox.moe/ii1j1o.7z
Prompt (dataset): https://archive.org/details/prompts-dateset
Discord link for more images: https://discord.gg/HvzRZB4u
These are my best models
Abby: https://civitai.com/models/265513/abby-riding-shotgun
Elizabeth - Burial at Sea: https://civitai.com/models/257648/elizabeth-burial-at-sea
Elisabeth: https://civitai.com/models/240263/elisabeth
Effie: https://civitai.com/models/172115/effie
Circe: https://civitai.com/models/245858/circe-generator-rex