"Secrets"
Well, here it is! This is what came to my mind when Solar said "Secrets". The poor guy feels too embarrassed to ask for tickles, so he built a machine to tickle him instead. As far as Solar's aware no one knows about it. (Though Moon has a hunch, as he'll often hear frantic stifled laughter from Solar's room when they're the only ones awake.)
Though this is Solar's secret, Lunar may grow curious in the near future, let's just hope Solar doesn't catch him~
I'm also going to be posting a Ler Earth version of this, because it popped into my head while drawing it, so keep an eye out for that!
Also, my new Solar headcannon is that he has freckles because yes.
I'm also pretty sure that this is my first posted piece of tickle art which feels very fitting!
