Mojina works at a women's underwear manufacturer. One day, she gets on a bus that isn't listed in the timetable out of curiosity and ends up being molested. It turns out that bus is the legendary molestation bus... With her cold, loveless marriage and sexual frustration, she develops a desire to be molested, wears lewd underwear, and boards the infamous molestation bus herself, becoming an M-slut pervert.
