Dahlia Academy is a boarding school where the students come from two enemy countries: the Eastern Nation of Touwa, and the Principality of West. However, Romio Inuzuka, the first-year leader of the Touwa students, has always been in love with Juliet Persia, the first-year leader of the enemy West students. One day, Inuzuka decides to make his move and tell Juliet how he feels.

Romio enters the White Cats dorm to celebrate Persia's birthday at all costs. While searching for Persia, he encounters the White Cats prefect, 'Cait Sith', and the two face off. Romio stands no chance. Though disheartened by their difference in strength, Romio doesn't quit, and fiercely runs at the window. His last hope. Will Romio and Persia's hands be joined as they climb the world's walls?