Just wait and wait until the ending!
Conan x Ayumi is still possible
so for the Conan x Ayumi Fans (If there is ) it is still possible
so dont lose hope!!
There are only 4 persons that are possible to be the Boss
1. Father of Shiho
2. Mother of Shiho
3. Sister of Shiho
4. Prof. Agasa
Since Shiho is the one who will be the most terrified when the boss is revealed