Bishoujo Senshi Sailor Moon SuperS Gaiden: Ami-chan no Hatsukoi

Ami Mizuno is used to standing at the top of every exam, so the appearance of an unknown student called Mercurius who repeatedly beats her scores becomes an obsession. At the same time, a love letter sends the normally composed Ami into a panic as she wonders whether the mysterious academic rival and her secret admirer could be the same person.

The stress attracts a youma that feeds on her anxiety. To defeat it, Sailor Mercury must stop treating every unknown as a problem that can be solved with test scores and face the unfamiliar confusion of a first crush.