Kamen Rider Shijiu

In 2021, a strange email attracted the attention of a person named Sijiu... Someone named "j_e_e_n_a" sent him an email with the content "We invite you to participate in an experiment." Sijiu followed the place mentioned in the email and came to an abandoned laboratory. This abandoned laboratory was the laboratory of SoulHunter Company back then! Sijiu entered the laboratory and was taken inside by a group of unknown people and conducted an experiment, codenamed, "Tesdy No. 49" Sijiu gained great power from then on, and when he was attacked by a monster again, he transformed into a Kamen Rider! This is what shocked SH's experimenters! In the battles again and again, the truth of the matter slowly emerged... "Kamen Rider Shijiu, will Shockingly be released in a few days?"