Yui has been assigned to a rural branch school to fulfill her dream of teaching in the natural environment. However, the naughty students Shota and his friends ignore their studies and indulge in pranks on Yui's big ass! It's common for them to lift her skirt, and it's common for Yui to have her ass touched. And as the pranks become more and more extreme, Yui becomes addicted to dick in both body and Kokoro ...