Based on a mystery novel written by Okura Takahiro, the story is about 24 years old Shirato Osamu, who had a good nature but wasn't popular. Upon running into his childhood friend Kurosaki Hitoshi while trying to find a job, Shirato was again and again dragged into several different mystery cases.
Shirato Osamu (Chiba Yudai), who is into his second year as a jobless university graduate, is very soft-hearted and timid. He is ignored by girls who treat him just like air. However, his life undergoes a sudden change when he meets his childhood friend Kurosaki Hitoshi (Hongo Kanata) again. Shirato, for some reason, becomes popular because of cases, and keeps getting embroiled in troublesome situations. He would honestly wish to put his own job hunt over solving cases, but how can he abandon the cases that he has accepted?