I know it's not what Manjuu was going for but Denver getting a sexy skin after getting basically nothing for years reminds me of a familiar storyline from anime & even Western media:
>Guy has a female friend as a child
>She's kinda cute, but he doesn't think about her romantically/sexually at all.
>He moves away for a few years
>Then comes back
>Finds she's grown into a hot young woman
>??? happens between them
>Then sex