Pictures that show the members of the nearly 100% female Touhou cast being clueless about men. They can be shown being flustered or surprised by sexual matters, showing little to no dating experience, or constantly misinterpreting innocent actions as sexual. Note: not every picture tagged 東方男性未経験反応シリーズ on Pixiv counts.

Largely started by tukiwani, but other artists have started to draw it too. In canon, only Moriya Suwako and Junko are confirmed to not be a virgin.

Common victims of this trope are the Old Maids Alliance (pool #1053). Also may have overlap with pool #3238.