Tsumugu Otome to Taishou no Tsuki

A Reiwa girl transferred into a women's school in Taishou!? Falling unconscious after an earthquake, when opening her eyes, Tsumugu astonishingly found her time traveling to Ginza in the year of Taishou 10(1921). Having nowhere to go, Tsumugu was helped by Itsuki, a duke's daughter, and she was suggested to transfer into Itsuki's school. How would Tsumugu's life become in a different timeline?