I Missed My Class

What happened after The Worst Witch Saves the Day (5 TWW book)? Mildred with help of her friends Maud and Enid saved the school from Agatha Cackle and Co, but what happened after this? And how H.B. is going to live with her broken broomstick? The Potions teacher has other problem too. There has a beautiful woman who helped H.B. when she had problems... Femslash obviously.