The Scream of Dead Souls? The Mystery of Terror Camp

Sailor Aluminum Seiren attacks an unidentified man. Usagi and the others travel to a lake, and Rei reveals that her cousin, a ceramic artist, lives nearby. The Three Lights have come to the same lake to film a horror movie. A monster appears and ravages Usagi's camp, causing Usagi and Rei to transform while the rest scatter. The monster's dialogue and the way he reacts to a pendant Rei reveals him as Rei's cousin, Kengo, turned Phage.