this is Hourou Musuko, an anime/manga about a young trans girl and her friends, all figuring out their gender identity and sexual orientations
yo yo i just double-checked and it is a real thing and also available on crunchyroll for free!
A study on masculinity and aggression from the University of South Florida found that innocuous – yet feminine – tasks could produce profound anxiety in men. As part of the study, a group of men were asked to perform a stereotypically feminine act – braiding hair in this case - while a control group braided rope. Following the act, the men were given the option to either solve a puzzle or punch a heavy bag. Not surprisingly, the men who performed the task that threatened their masculinity were far more likely to punch the bag; again, violence serving as a way to reestablish their masculine identity. A follow-up had both groups punch the bag after braiding either hair or rope; the men who braided the hair punched the bag much harder. A third experiment, all the participants braided hair, but were split into two groups: those who got to punch the bag afterwards and those who didn’t. The men who were prevented from punching the bag started to show acute signs of anxiety and distress from not being able to reconfirm their masculinity.