I'm not getting any grades and I'm still in school today.

Aika has transferred to the special advancement S class at a prestigious school that is famous all over the country. However, there he was left to the absolute ruler, Toni Teacher, and caste class guidance was given. The top students on the exam are treated as kings, while the bottom students are punished as completely fixed and forced study with drugs in the brain... "If you can't study, I'll give you a punishment as a slave to your class." Aika, a busty high school girl, is pinned down for being a dropout and undergoes punitive training!