Vol.1:
Sono Yubi Dake ga Shitteiru (The Lonely Ring Finger)
Vol.2:
Hidarite wa Kare no Yume wo Miru (The Left Hand Dreams of Him)
Vol.3:
Kusuri Yubi wa Chinmoku suru (The Ring Finger Falls Silent)
Vol.4:
Sorete Yubiwa wa Kokuhaku suru (The Ring Will Confess His Love)
Vol.5:
Sono Yubi Dake wa Nemuranai (Only That Ring Finger Will Sleep)