本好きの下剋上 領主の養女
Ascendance of a Bookworm: Adopted Daughter of an Archduke
Honzuki no Gekokujou: Ryoushu no Youjo
Drama · Fantasy · Slice of Life
Following a disastrous encounter with a noble, Myne finally resolves to say goodbye to her family and friends in the lower city, changing her name to “Rozemyne” and beginning her new life as the adopted daughter of Ehrenfest’s archduke. However, her days as an archnoble in noble society are brutal,...
Synopsis excerpt via AniList, originally from J-Novel Club.