The Seijou Girls Academy's Kendo Club is traveling to Shoushinji for summer training camp. Near there is an island, Urashima, where a demon extermination took place long ago. It happens that this summer something related to that demon extermination is also going to take place as the captain of the team, Osanai Syouko finds a young girl washed up on the beach... This is the official comic based on the PS2 game Aoishiro which is a sister game to Akaiito.

Akita Momoko who entered Seijou Girls Academy is staying in the dorms. Her roommate is Aizawa Yasumi and Momoko is drawn to her, but Yasumi is searching for a different girl. Who is that girl…and what will become of Momoko’s feelings…!? Based on the PS2 game Aoishiro and serialized in Yurihime, this story which takes place before the game has finally appeared.