What Does It Taste Like Under the Mask?

Gavv confronts Valen, the new Kamen Rider who defeated the Granute. Unaware of each other's true identities, the two begin to probe each other. Later, Sachika and Shoma are asked to do housework at a relative's mansion, where they meet a young artist who lives there. Meanwhile, Hanto visits a gallery to investigate an unsolved disappearance...