INT. UNIVERSITY CLASSROOM - DAY A number of STUDENTS are at their desks, glancing up at the CHALKBOARD and hurriedly taking down notes. The class, devoid of podium, echoes with the SOUND of chalk furiously scratching out equations. Sitting amongst the students is Takayama Ryuji, his eyes focused on the chalkboard. Behind him sits a pretty young student, TAKANO MAI, who looks up to sneak the occasional, furtive glance over at her teacher. Ryuji suddenly rises to his feet, chuckling. RYUJI OK, OK. Stop. He begins walking towards the blackboard. RYUJI With this equation, we'll just have "0" extending on into infinity. A few CHUCKLES arise from the audience. The STUDENT at the chalkboard ceases writing, looks down shamefacedly. RYUJI Hang on a minute, though. Ryuji halts before the chalkboard, gleaning possibility. He makes a small adjustment to the equation. RYUJI There now. The students in the room sit at attention, taking notes in earnest as Ryuji begins scratching out an elaborate string of equations. Of the students only Mai sits motionless, regarding Ryuji intently.