The story revolves around a transfer student, Mamoru Amakawa. One day he received two love letters: one from Sakura Sumiyoi, daughter of the gang leader who owns the northern half of the city, and the other from Ageha Kurosaki, daughter of the Black Rose mafia leader who rules the southern half of the city. Unfortunately, these two fell in love with him and willing to do anything just to get his affection. How will he cope with these sticky situations?
* Based on a light novel by Tsukino Otogi with illustrations by Yuyi.
One day, Amakawa Mamoru receives two love-letters. When he goes to meet their senders at the appointed place, the rooftop, he finds two diametrically opposite girls waiting for him. One, Sumiyoi Sakura, is a refined black-haired beauty and quintessential Yamato Nadeshiko. The other, Kurosaki Ageha, is a doll-like twin-tailed platinum blonde. However, when they realise that they had both sent love letters to the same person, hostilities broke out with one drawing a katana, and the other a pair of pistols. It turns out that Sakura belongs to a yakuza family, while Ageha is from a mafia family, and the town is evenly split into two between them.