GATE 7 Volume 3 will be out May 2nd and there will be a promotional campaign [はな専用麺どんぶり (Hana's Exclusive Noodle Bowl)] in Kyoto. 100 people will be chosen by lottery to receive a ticket. There will be a Gate 7 pilgrimmage map pointing out Kyoto shrines, temples and places visited in the manga. Seven Kyoto bookstores will have different limited edition illustrated postcards. There will a prize of a CLAMP-autographed poster and June's manuscript pages.
[More details at CLAMP-NET]