If you're looking for manga similar to xxxHOLiC Movie: A Midsummer Night's Dream, you might like these titles.
Once upon a time, a little girl in ancient Japan met a Kappa. After that she seems to have her eyes opened and encountered many mythological creatures in her daily adventures.
Yuuji Abe meets a mysterious girl at the subway station. This chance encounter with Kana and Rou, her wolf companion entangles Yuuji in a plot concocted by the Seven Heads, a group of half-demons who want to bring a type of utopia where humans and demons can live together peacefully, albeit through unscrupulous and forceful means. As the group targets Kana and her companions, Yuujo begins to discover the truth not only about Kana, but about his own ancestors, and ultimately comes to terms with his budding feelings for this mysterious girl.
A series of short stories detailing the exploits of Dr Imibe Kana, a researcher on Japanese mythology and religion, as she travels around the country becoming involved in various occurrences centred around ancient traditions and folklore.
On a trip to look for his brother, a hungry Hachiya Rei stops at a shrine to pray. It is just his luck that he is accused of stealing money from the shrine and forced to work to pay off the amount stolen. However, the real thief turns out to be a daemon, or a god turned evil! An encounter with the daemon unleashes Kagutsuchi, the god of fire, concealed in Rei. As Kagutsuchi's proxy, Rei can use the god's holy fire to purify daemons, but there's a side effect...