Asuko March!

Nao Yoshino has failed the entrance exam for her target high school. Devastated and defeated, she enrolls in a technical high school called Kenritsu Asuka Kougyou Koukou, or "Asukou" for short. Out of the 148 entering freshmen, only three are girls, and Nao is the only one in her class. Surrounded by boys and stuck taking part in dirty, challenging, technical classes that she doesn't want to take, Nao finds herself feeling frustrated and alone. But when her male classmates, one by one, begin to come around her and lift her up, Nao learns...maybe her new school's not so bad after all.
~~ Adapted from the manga series "Asuko March! ~Kenritsu Asuka Kougyou Koukou Koushinkyoku~" (アスコーマーチ!〜県立明日香工業高校行進曲〜) by Akiyama Kaori (アキヤマ香).