Who Is That Masked Man?

Usagi and Naru discover from Umino that their home economics teacher, Ms. Akiyama, is engaged. Unfortunately, this teacher is Nephrite's newest target to collect energy. Ms. Akiyama decides to enter a handmade wedding dress contest in order to win a grand wedding reception. Usagi and Rei also enter. Rei decides that she can learn from Usagi's mother, a full-time housewife, how to sew, but Ikuko doesn't know how, either! Meanwhile, Nephrite puts a curse on the silk material Ms. Akiyama is going to make her dress out of for the contest.