|Air Date||March 7, 2015|
|Season||Black Moon Arc|
|Total Episode #||17|
|Previous||Act 16. Abduction, Sailor Mercury|
|Next||Act 18. Invasion, Sailor Venus|
Chibiusa tags along with Usagi to the Game Center Crown. Afterwards, the Senshi, realising Chibiusa is Black Moon's true target, feel they need to solve the mystery behind her in order to save their captured friends. Later that night, Mamoru experiences a brief flash of Chibiusa's memories upon approaching her, showing the image of explosion. Meanwhile, Asanuma, an underclassman of Makoto's who had overheard a curious conversation between Usagi, Mamoru, and Luna, look after Makoto, who is suffering from cold, and learns about her battle, hoping to become strong enough to protect her. Shortly After Asanuma leaves, the third Specter sister, Petz, who had been spreading a virus across the city, sends an army of Droids to replace everyone in their weakness. Despite Usagi managing to defeat Petz, Makoto, having been weakened by the virus, is caught by her thunder and captured by Rubeus.