Kiriya Yuto is a science teacher at private school Haruzono.

One day, Yuto receives a package.
It was from Sarah, whom he met in France. They shared common interest in perfume.

In the package, he finds a letter, old book and strange liquid in a bottle.

It looks like Sarah has succeeded in making the perfume which Yuto was looking for.
Furthermore, the letter asked Yuto to execute hypnosis experiment on one to collect data.

Yuto decides to do this experiment on his student, Nonomiya Amane.

What happened after this experiment?

[From DLsite English]