Type A (CD + DVD)
Type B (CD + DVD)
SDN48's first single is now available for pre-order from CDJapan! And YesAsia, eventually, after someone bugs them for it.
... Maybe I should get on that. XD
Anyway, however you do it, buy it and support SDN48!!
EDIT: I've got HMV links too!
Type A (CD+DVD)
Type B (CD+DVD)