Isami Kodaka
On July 27, Shirai made another appearance as Kaguya for Pro Wrestling Wave, when she took part in a match, where Ayumi Kurihara retired her masked A☆YU☆MI persona. Replacing an injured Ray, she teamed with Leon to defeat A☆YU☆MI and noki-A, the masked Akino, in a tag team main event. Back in Ice Ribbon, Shirai formed a new partnership with rookie Rutsuko Yamaguchi. On August 25, Shirai and Yamaguchi defeated BBA38 (Cherry and Meari Naito) to become the number one contenders to the International Ribbon Tag Team Championship. They received their title shot on September 22, but were defeated by the defending champions, Muscle Venus (Hikaru Shida and Tsukasa Fujimoto). The following day in Union Pro, the Nazo Fukumen storyline was concluded, when first Kaori Yoneyama unmasked Nazo Fukumen B as Shirai during a mixed tag team match and later in the main event, Nazo Fukumen K, KJ and P lost to Union Seikigun (Isami Kodaka, Madoka and Seiya Morohashi) in a three-on-three hardcore elimination match. Post-match, the now unmasked Hiroshi Fukuda apologized for the stable's past actions and both he and Shirai were welcomed back to Union Pro by the promotion's official representative Naomi Susan. Shirai then entered a storyline built on the relationship between Union Pro and AV company IdeaPocket. Picking up wins over the likes of Hiroshi Fukuda, Masayuki Mitomi and Menso～re Oyaji, Shirai earned the right to collaborate with AV actresses such as Rika Seibi, Ryu Mizusaki and Tsubasa Amami. On October 20, Shirai returned to AJPW, when the promotion held its first women's match in years, where she was defeated by Akino. Six days later, Shirai made her debut for the AJPW splinter promotion Wrestle-1, defeating Bambi in a singles match. In late 2013, Shirai formed a new cross-promotional three-woman stable named Kuros with Misaki Ohata and Tsukasa Fujimoto. After not appearing for the promotion for thirteen months, it was announced on October 31 that Shirai would be returning to Wrestling New Classic as the newest member of Makoto's Shiritsu Puroresu Gakuen ("Private Wrestling School") stable. Shirai, however, quickly established that she was not on the same page as Makoto, announcing that she was bringing Misaki Ohata with her to confront the "wimps" in charge of the school. Shirai's WNC return match took place on November 29, when she and Ohata defeated Makoto and Miyako Matsumoto in a tag team match. On December 27, Shirai and Kana announced they were disbanding Triple Tails.S, with their final self-produced independent event taking place in early 2014.