Wanted to add separately that today, Nightmare’s Yomi likely invited him to Nightmare’s final stop of their 47 prefecture tour in Sendai.
Yomi said today that a friend of his came to the show and said something along these lines:
“Taira, Nightmare has come this far, and we have been moving forward at our own pace. So Taira should move forward at his own pace too.”
[Source: @mmm who went, pls confirm!]
Taira has previously said that Yomi is a friend from the same hometown, so I believe Yomi was referring to this Taira, which I also understand from @mmm that they are very close.
Update: it was him!