Seventh Lair is an April Fool's visual novel that takes the characters from House In Fata Morgana and places them into a new world with new backstories.

I normally don't care for parody/joke visual novels but I loved this, and it does include the usual sincere/heartbreaking Fata Morgana magic later on. Look past the somewhat rough presentation and fan game feel of everything, and you'll have a good time with great characters and a story that isn't as one dimensional as initially presented