The 9th compilation marks a shift from the original "Plain Girl Omnibus" concept, bringing together the secretly interconnected "Banged Gyaru" episodes into one cohesive narrative, creating an entirely new storyline. However, due to branching subplots, a perfect consolidation wasn't possible—leading to the decision to feature plain girls on the first disc and banged gyarus on the second, grouping them under the theme of "Troubled Girls." This was an impromptu project, born from spontaneity with some uncertainty, yet it ultimately revealed unexpected charm. For the first time, the "Marimo Chapter" is included with newly shot footage, depicting a bold scenario where a plain girl sets her sugar-daddy meetup late at night, targeting an underground idol who's missed her last train, resulting in non-stop sex and four consecutive ejaculations. In the Banged Gyaru arc, Canon, a gothic lolita girl lured into a trap, introduces timid Yura and assertive Kyoka to a creepy otaku pig man, marking the beginning of new victims. Later, Yura sacrifices Kotori—a busty, cute-type girl desperate to protect her child's secret—and Honoka, a competitive yet highly sensitive girl, to the perverted fat otaku. Kotori, fully aware of the truth, turns the creep's vicious fangs back onto Yura. Ayaka, driven to preserve her friendship with Kotori, offers her entire body as a sex slave, transforming into a sensual temptress whose seductive smile gradually drives the pig man insane. A dominates B, B dominates C, yet C cannot defy A—forming a twisted cycle of rock-paper-scissors domination, a four-way mutual devouring among band gyarus. Previously scattered footage has now been reorganized chronologically, making it clear at a glance who acted when, with what intentions, and where they schemed behind the scenes. For the second time featuring "Monster Collection," the Kotori and Ayaka erotic segments consist exclusively of newly filmed angles, never before seen in the DVD version or previous Monster Box releases. The Marimo chapter runs 90 minutes, with an additional 50 minutes of previously unreleased footage, totaling 140 minutes of content.