Я покараю вора!

A thief crept into Aino Minako's house and stole a box of jewels. The stolen goods are said to already be on their way for sale. At the same time, Usagi is invited to a must-attend jewelry auction by Naru's mother who is a jewelry designer. Appearing at the location where she is to meet them is none other than Chiba Mamoru! Thinking that Usagi is in love with Mamoru, Naru has secretly created this set up. An air of unpleasantness surrounds the two of them. Usagi tries to leave but in running away she bumps into a man, and in the impact Usagi recognizes- and he confesses- that inside his bag is Aino Minako's accessories!