Shinimodori Oujo wa Ikinobiru tame ni Yuri Harem o Tsukuru koto ni shita

From Seven Seas: As queen, Marie had it made: she spent her days in luxury while lording over her subjects. But her tyrannical ways eventually caused her downfall, and she was sent to the guillotine by her people. When the blade drops down, Marie doesn’t die. Instead, she wakes up one year in the past! Stuck in an endless loop, nothing she tries seems to change her fate. Her only chance of avoiding certain death is to win over the countless women who have it in for her by seducing them one by one.