Yukawa reconnects with his classmate Ayane after her husband is poisoned. He later conducts an experiment that may help solve the mystery of his death.

A company president is poisoned. Yukawa learns the widow is his former classmate, Ayane, and tells her he will aid the police in their investigation.

Associate Professor Manabu Yukawa is handsome, smart, athletic and referred to as "Oddball Galileo." Detective Kaoru Utsumi visits him about a case.

A baseball player seeks Yukawa's advice about getting back to the big leagues, but then the player's wife dies from carbon monoxide poisoning.

Detective Kishitani requests Yukawa's help investigating a murder that occurred during a mountain hiking event. Interested, he visits the crime scene.

Kishitani seeks Yukawa's advice about the murder of Ryosuke Komada, a popular theater troupe leader who was on the phone at the time of his death.

Someone called the "Devil’s Hand" sends threats to the police challenging Yukawa, claiming their crimes will determine who the true scientific genius is.

An executive has a breakdown and is found dead the next day. Yukawa seeks to uncover the mystery behind a curse that drives people to suicide.

While investigating a mysterious death involving a mummified crow tengu, Yukawa meets Yui Kojima, the last person to speak with the deceased.

An elderly woman who lives alone is murdered, and Yukawa encounters a high school student who relies on a crystal pendulum to make decisions.

Detective Kishitani seeks Yukawa's help with an attempted murder case. The victim's twin sister sensed the danger, which piques Yukawa's interest.