Mamoru and Usagi's Babysitting Mayhem

Ail and An turn their energy hunt toward the youngest victims yet, unleashing the Cardian Amaderasu on a daycare. When the assault leaves the caregivers hospitalized, a baby named Manami is left with no one to watch him, so Mamoru steps up and Usagi insists on pitching in. The catch is that Mamoru still carries no memory of the bond he once shared with her. The dub called this Much Ado About Babysitting.

Amaderasu drains the babies and their minders before Usagi and Ami can respond, and Mamoru volunteers to keep Manami for the three days the adults need to recover. At his apartment the pair muddle through the crying and feeding, Mamoru proving a natural while Usagi struggles enough to walk off worried the two simply do not mesh. An later drops by to try her hand at the child, gives up after being wet on twice, and the baby soon takes his first steps for a delighted Usagi and Mamoru.

The Cardian resurfaces at a second nursery, downing Venus, Mars, and Jupiter and bubbling away the infants. Moonlight Knight's rose breaks the drain on the newly arrived Usagi and Ami, freeing the captives. Sailor Mercury debuts Shabon Spray Freezing to lock the monster in ice, and Sailor Moon ends it with Moon Princess Halation. A day on, Manami's recovered mother collects him, and the toddler says both their names before parting.

This is the first time Sailor Mercury wields an attack that does real damage rather than only clouding a foe's sight, freezing her target outright. Both Manami and his mother appear for the first time. The story closes out a run in which the aliens preyed on steadily younger people, moving from middle schoolers to kindergartners to babies, and the dub title riffs on Shakespeare's Much Ado About Nothing.