Nidoto Ie ni wa Kaerimasen!

Chelsea lives at the abusive hands of her mother and younger twin sister's daily torment. But on her twelfth birthday, the Appraiser Glen visits her father's barony and tells her she has a never-before-seen Skill—[Seed Creation]! Desiring to study this newfound special ability, Chelsea is whisked away to the Royal Research Institute. Her life then drastically improves, from being treated worse than dirt to being presented with her own living quarters and even personal maids! But her sister Margaret isn't happy with this sudden change at all...

(Source: J-Novel Club)