The corridors of the two buildings lay on the same straight line. Looking from outside the Mystery Phenomenon Research Club toward the Old School Building, they could see the "Locked Biology Classroom" at the very end of the corridor.
"When we saw the body through the window, the classroom door was open. The body was hanging inside, and that masked person was standing beside it. But by the time we ran into this corridor..."
Jiang Xia tapped the Floor Plan. "The classroom door was tightly locked. After we kicked it open, every trace had vanished."
Kudo Shinichi paced back and forth beside the table, clearly equally concerned about the body suddenly disappearing and reappearing.
Following up on what Jiang Xia had said, he muttered in a low voice, "In other words, the Biology Classroom door was out of our sight for only ten-odd seconds. In that brief time, disposing of the body, cleaning up the candle wax and candles on the floor, erasing the Magic Array... that's simply impossible—especially since all the windows were locked from the inside. It was a locked room."
"N-no, it's not impossible."
The advisor teacher's face was deathly pale, his lips trembling. He took out a handkerchief and wiped away his sweat, speaking as if in a dream. "That kind of magic trick is no problem at all for the Magician After School."
"The Magician After School? The key figure behind the Seventh Mystery?" Hattori Heiji abruptly turned toward the advisor. "So you really do know something about him!"
The advisor teacher startled, realizing he had misspoken. He shook his head, looking as though he no longer wanted to say anything and only wanted to slip away as quickly as possible.
Fortunately, "Officer Kenmochi" beside him finally showed a bit of what a police officer