Page 11 has some logical error in the translation. Tewi says: "..you won't even be able to trick Reisen!", should probably be "you will be able to trick even Reisen.". Kind of a weird thing to say, since Tewi earlier said Reisen will easily fall for it.
Oh my god, how did I miss this!? My profound thanks to the translator of this doujin. RUMP/bon have so many great looking Touhou doujins, it's a shame only two of them (this one included!) have ever been translated into English from what I can tell. It's amazing how the group/artist can go from teeth rottingly sweet/adorable with the "Eringe" series, to totally sexy with "Eringe San" "Alice Souuke de Otoko Jijou" and "Akai Rekishi ni Ao no Spice San." Exceptional work from this group/artist all around.