Darkness, the Hat, and the Travelers of the Books

Hazuki (1x1)

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Hazuki Azuma has developed a sexual attraction to her adopted older sister Hatsumi. Hatsumi, however, disappears on the morning of her 16th birthday. Hazuki goes world-hopping in search of Hatsumi along with her companions, a Kansai dialect-speaking bird, Ken, and the hat-wearing Lilith known as Eve.