In The Light of The Moon

Trigger: Encountering the strange slime.
Type: Plot Echo, Tier 1, Item
Regain: Lily regains Yuri's fashion show outfit from soon after she joined the remainder of the Heartcatch team.

Trigger: What that slime turns into is various sheets of paper with fashion designs as drawn by Yuri's teammates.
Type: Recurrence, Tier 1, Memory
Regain: Seeing the designs and the outfit she gets from the above plot echo, she remembers the fashion show that Erika and the others shanghaied Yuri into.