Highly Responsive to Prayers:
Not yet tried

The Story of Eastern Wonderland:
Tried --> Very Hard >_<
Marisa kicked my butt...
Mima kicked my ass ~"~

Phantasmagoria of Dim. Dream:
Not yet tried

Lotus Land Story:
Tried --> Easier than I expect (?)
Is it just me... The Yuka-in-pajamas (Stg-5 boss)
seems to be harder than the normal Yuka (Stg-6 boss) @@?

Mystic Square:
Reasonably difficult (similar to EoSD's difficulty)
Yumeko --> A somewhat-similar-to-Sakuya knife-throwing maid
(here theme music is good)
and ... Shinki-sama!!!! ("pwnage" BGM + wings)