In the morning, as Saya comes into her classroom, she finds a blue rose.

Students are murmuring about the phantom legend that has been the gossip at the lycee. Saya and Hagi sneak into a rose garden beside the church where it is said the blue roses were in bloom. And they find steps leading to the underground...

Mao gets frustrated for not being able to see Kai and she feels left out. Okamura, the Ryukyu Daily reporter, cannot forget about the sight he witnessed in the wine barrel storage at the lycee in Vietnam.

Mao wants to pursue Kai.

Okamura wants to find Saya to solve the mystery of what he saw. Then, two people with the same goal and different motives meet...