Conan investigates and realizes how the pranks were done and who is attempting to scare Haruna away. After tranquilizing Kogoro, Conan reveals that the shadow was created with the use of black paper tapped to a window. When a moving car light flashes through the window, it creates the shadow of a flying figure. As for the Koto, Conan explains that the Koto was suspended through a very long string which was released by the culprit; As evidence, Conan reveals that a hairpin was found at the door where the string was and the one who opened the door was Kazuko Ogata. Kazuko confesses and explains that she did not want Haruna to have the stamps since her family is currently in need of the money. Conan reveals that the missing music notes reveal the location of the stamps. Conan explains that the missing notes in Solfège are La, Do, La, but in Iroha its I-Ha-I which is referring to Spirit tablet (?? Ihai?). A few days after the case, Shirou Ogata reveals that he is in a relationship with Haruna and thanks Kogoro for solving the case.