Tomokazu Shudo (Junpei Mizobata) has his first ever crush on Sugina Mayama (Saki Aibu), a senior student.

Tomokazu has troubles confessing his feelings to the popular student, but one day, he is invited to the research lab where Sugina Mayama works.

To Tomokazu's surprise, when he arrives he first sees a big wooden box in the middle of the dark lab.

The device hopes to turn people into monsters from the neck down while watching or thinking horror-related things.

The first experiment fails, but Sugina then gets the help of childhood friend Takashi Gori (Yuta Hiraoka), who is now a horror writer named Mataro Echizen.