Does the existence of this picture along with post #2010037 merit the creation of a seiran_(touhou)_(bunny) tag?
I'd say "No" for two reasons: 1. These two new ones are highly unlikely to get approved for all the obvious reasons. 2. There needs to be a full page of them, at the very least.
But, meh.. what do I know. We have tags for things we already have covered with two tags and they don't hardly make a single row (In fact, I spotlighted one instance, in particular, a while back as just a singular example of this).
Short version... feel free to do so, if you think it's merited, I suppose.