On July 21, it was reported that five members of Kamen Joshi have tested positive for COVID-19. 

The members who tested positive are Seira Saria, Sena Mitsuki, Ueshita Ao, and Kitagawa Misaki, and Kamen Joshi cadet Ouya Shizuku. Meanwhile, ten members of Kamen Joshi have been identified as persons of close contact.

In addition, Hinata Nao, Nozaki Yurika, and Shirosaki Momo of idol group Cerisier, who is also managed by Alice Project, have been infected with the virus. Currently, none of the members are experiencing severe symptoms.

Consequently, Kamen Joshi and Cerisier will both be suspending their activities until early August.