Head B0y - Version 0.1 + Save + Fix by Head B0y - Adult Sex Game

You play as Alex, the first man able to attend Saint Martin's Ladies' College, a school for young ladies. You won your way into the school on the back of your mum, Erica, a former student and current chair of the Board of Governors. Concerned about money she has lent the school, and nostalgic for the more freewheeling days she enjoyed, she has sent you to the school in the hope of shaking things up. Together you will change Saint Martin's and, hopefully, have some fun in the process.​


FIX:
Until a fix is ready, it is possible to move the story along, by using the console and enter:

SugarCube.State.variables.submissiveCharlotte=15

Edit: Setting her submissiveness to 15 did not progress the story.
SugarCube.State.variables.charlottePosture=1 does as Rfpnj said