Toaru Kakutou Shoujo no 4-Nenkan ni Wataru Zecchou Choukyou

Special Cultivation City--
A place where students with special abilities are
collected and taught to maximize their skills.

Mikoto Mis*ka was training to be the world champion of kickboxing.

One day, the gears of fate turned drastically.
She came across a bullying situation and intervened,
delivering a critical blow to the bully
... who turned out to be the son of a
wealthy and influential SC City politician.

Mikoto was convicted of assault.
Her punishment was unique. Instead of being exiled
from SC City she was transferred to a low academy
of all boys, who from the very first day
began to have their way with the "criminal".

Her virginity was taken, and her dignity, and her hope.

Four years of crushing misery had begun.

[from DLSite English]