Hareta Hi no Dress Code

If only I could wear my favorite clothes however I want... Natsuki Yonei, a first-year high school girl, thought about wear slacks to school, but she ended up going with the "safe" option of a skirt instead. But she notices another girl, Miwa Omi, who is wearing pants, even though almost all the other girls are wearing skirts. Intrigued, Natsuki tries to befriend her, and she learns the reason why Miwa doesn't wear skirts... *Source: Ichijinsha, translated*