The mysterious death of Dr. Maunuma still appears in my dreams from time to time even now. That was a really creepy, scary thing. Especially since then, in less than a month, my mentor Dr. Kasagami and his wife, whom I respectfully call my father, also unexpectedly committed suicide! I was so horrified at that time that I was completely lost and could not even shed tears. I finally came to my senses and read the only suicide note left by the doctor. I suddenly felt a despair as if I had fallen into a bottomless abyss... The author Koga Saburo is the originator of the concept of "honkaku" in Japanese mystery novels. His ideas often use the relevant knowledge of physics and chemistry, so he is called the hero of science and engineering, and his works are full of scientific charm.
