This manga is from the 90's, but I love the plot. The ending, I don't think it was happy or bad, just an ending to a moment, like in real life when stuff just ends or continues, kind of an open ending.
To be honest, I don't ship Ian with Jeremy, but I love William, Marjorie, Valentine, Eric, and Poppy.
Zankoku Na Kami Ga Shihai Suru