If you're looking for manga similar to xxxHOLiC: Tokubetsu-hen - inspired by Suga Shikao "Anata Hitori dake Shiawase ni Naru Koto wa Yurusarenai no yo", you might like these titles.
Born on the north coast of Taiwan, the girl Lü moved to Taipei for university. The big city offered many new experiences, but it was also challenging and lonely, until she met a boy playing in a band at the live house Kafka By The Sea. With his music, he helped Lü expand her horizons and find a new purpose in life. And as they spent time together, their feelings for each other gradually grew. But a musical opportunity for him caused a chasm between them that might be too wide to cross...
Follow a girl in the "Threshold" (Hazama), a world between Heaven and Earth. "Impure souls" — those that could not ascend to Heaven with the burden of their own weight — have drifted to this world of constant warfare.
Gumi is a girl with a deep affinity for sweet things. Spicy, bitter, and salty things just don’t do it for her—but is the sweet boy she likes quite what he seems?
Orio Azuru is a young man who doesn't understand his gender. In this town, "he" is the freest. Midou Renri, the one he fell in love with—or so he should have.
Chiharu isn't a girl who sees the point in things like romance. To her boys are just an annoyance, but what will she do when she starts to develop feelings for a boy at her school?