Kamen Rider Series: Season 31, Episode 9 - ProjectFreeTV

31 - 9: 重なり合う、剣士の音色。

After his recent feats, Touma is recognized by the others as a full-fledged member of the Sword of Logos, but when the Megids prepare multiple Alter Books for their next plan, Tetsuo Daishinji, the order's mechanic, joins the fray as Kamen Rider Slash after repairing his own weapon.