Cruel Serenade 1 is indeed still showing in search, though you have to actually do the search, it won't be an auto-suggestion. Be sure that "Show content marked as adult in search & browse" is turned on in your account settings under "Content."
It's also worth mentioning that the games have been around long enough now that they all come up easily in Google. If you even need to pull them up quickly, just search there and bypass whatever Itch may be doing completely.
Also, out of curiosity, what is PH?