Jun Takahashi showed his collection on pairs of identical twins: How sweet! Each sister act came out with matching hairdos and wearing different versions of the same outfit—one playing it straight, the other a visual meltdown of the look, like a reflection in a fairground mirror. Takahashi worked his idea across a range of fashion standards, like sailor tees and khakis, white shirts and black pants, French trenches with Kelly bags, and American blue jeans and baseball shirts.

Shows like these are what fashion's cool-seekers come to Paris to see: ideas that make you smile, but also engage the brain. For all its surface innocence and playfulness, the Undercover collection always has, as its name suggests, a subtext. This season, the pacifist Takahashi weighed in on the origins of current world conflicts. On the soundtrack, John Lennon and the Plastic Ono Band raged against organized religion ("I don’t believe in Jesus...I don’t believe in Buddha") while the twins massed together for a finale wearing T-shirts reading, "Violence invites violence," "Silly to kill," and "Who wants to be a soldier."