Green's Search for Gensokyo

Serious version: What if, after the end of everything, everything still didn't end? What if two worlds that should never have intersected came together? What would happen then?

Plain-spoken version: Two games that had already reached their true endings don't end there, but instead merge after the true endings. Maybe this will change the two tragic stories from what they were originally?

Goofy version: "Doctor Yagokoro, I think I'm sick."

"?"

"I went from seeing everyone as Alice to seeing everyone as Little Red Riding Hood." (Sorrow)

P.S. But actually, this is just a crossover between BS and Touhou Chronicle. (Shrugs)

P.P.S. So this is either BS 2.5 or Touhou Chronicle 3.05 (or maybe BS Chronicle?)