Hey there Fyfyone, thanks for reaching out! There most definitely is an ending for Keeves (guy on the bus). Have you only encountered him once? You need to at least encounter him twice to be able to be set onto his route. I think in order to meet him again you must first tell him that "You'd like to see him again" at the end of encounter one.
Then you must decline Jaja's offer for icecream. Hope that helps!