Who are they? Can I get a link to the chapter they are talking about?
Thank you good sir.This is the business guy Tatsu-nii is selling to. They get along pretty well.
He shows up in Ch. 8.5, Ch. 83, Ch. 84 (this ties in the music event), and Ch. 107.5 (outside of event hall).
This is just them reminiscing about the past. This is the only chapter it's referenced.