demcntia:

a Concept™: you and your partner make a pinterest board and each pins something after the other until you’ve reached a certain number (be it 20, 30, idk). at that, you stop and make up a plot/au from the things you two gathered. 

p.s.: you can’t/shouldn’t discuss your ideas before you reach that number though, or it kinda kills the purpose behind it. the more pins you manage to include or base the plot/au out of the better !!