At 2AW Grand Slam In TKP Garden City Chiba, an event promoted by Active Advance Pro Wrestling on August 29, 2021, Shirai teamed up with Ayame Sasamura to defeat Madeline and Rina Shingaki.

[7] She participated in Sendai Girls' Pro Wrestling 2021 edition of the Jaja Uma tournament in which she defeated Kanon in the first rounds but fell short to Yurika Oka in the semifinals.

on June 16, 2021, where she teamed up with stablemates Asuka, Ayame Sasamura and Makoto, alongside Hanako Nakamori in a losing effort against Citrus Wind (Arisa Nakajima, Honori Hana, Nanae Takahashi, Riko Kawahata and Yumiko Hotta).

[12] At SEAdLINNNG Shin-Kiba Series 2023 on January 13, Shirai competed in a battle royal won by Riko Kawahata and also involving many notable opponents, both male and female such as Amazon, Hiroyo Matsumoto, Kaho Kobayashi, Kakeru Sekiguchi, Ryo Mizunami, Kyohei Mikami and others.

[17] She took part in the 2022 edition of the Synchronous Love Tag Team Tournament in which she teamed up with Chie Ozora and defeated Kazuki and Megumi Yabushita in the first rounds, Kaori Yoneyama and Leon in the semifinals, but fell short to Rydeen Hagane and Saki in the finals on June 26, 2022.