@Flare3500 Well, that kind of problem is never completely "solved" . . . but a strong home base makes a huge difference. And that girl's tough . . . the only reason the bastards managed to beat her down was she had nowhere solid to stand.
I really hope next chapter has the encounter with Mayumi's best friend. It would be nice if she got some closure.
Then again, maybe she's just an irredeemable jerk.