In the bustling world of urban transit, the Crimson Girls stand as vigilant guardians against those who prey on unsuspecting women. Episode one follows Mitsu as she draws the notice of an enigmatic stranger gifted with an extraordinary power to sway others through the slightest touch. Joining forces with his companions, he sets a trap during her routine commute, leading to an unexpected detour to a private location that puts her resolve to the test. With Mitsu now under his influence, attention shifts to the next objective: her fellow protector, Saki.