Kanbayashi & Kirika series

In the middle of searching for his ideal Lady X, Kanbayashi Toshihiko, a young popular writer meets a popular teenage artist, Kawamoto Kirika. Together they solve a lot of cases and go through many things. With Kirika's help, will Kanbayashi find his Lady X? One-shot included in the books: Tenshi to Yuurei (volume 1), Remix (volume 3), Otome Shinkaron (volume 5), Digital Kankei (volume 6), Nobara (volume 7), Anemone Meikyuu (volume 9), Akinomiyajima Satsujin Jiken (volume 10), Last Child (volume 11), Heart Poisoner (volume 12), Hikari no Naka no Darkness (volume 13), Madonna Complex (volume 14), Nise Acacia no Mahoutsukai (volume 15), Masquerade - Kyosoku no To (volume 16), Koenaki Utahime (volume 18), Zutto, Yume o Mite iru (volume 19), Toraware no Utahime (volume 21)