Angel or Devil!?

Despite a stern demeanor, schoolteacher Tomo Fujiki has a weakness for cute things, but can't really express this. As the teacher with the scary reputation, Fujiki naturally scares the living daylights out of the new, angelic, and unbearably cute transfer student, Kazunari Shiina. Fujiki resolves to change his intimidating nature, but the appearance of a mysterious young man late one night who steals a kiss makes him rethink the Mr. Nice Teacher act. The boy claims the same name as Kazunari Shiina, but his personality isn't that of a cute little angel, but a sneaky little devil. Are there two Kazunari Shiina or is it just Fujiki's imagination?