First, Thanks to reply me! =)
So...
I have no relations with any male studant. My MC is 100% lesbian. I have any no flirt with any male studant, but, my relations with all studants are max. Only Draco is a "Best Friend" until now.
In quest 6, i choose talk to Astoria and give Collin. I have chance to active quest 19 or no?
For the quest 20 i have to date a male studant, in this case, Collin? But no, i have no intention to date any male studnt. Has no other way to active this quest? I lost this quest for all?