Mochiron ya! Ore ha Yoshida Ayumi no fan ya de!
While on a case, Ayumi often makes simple observations that help lead to progress and resolution. For instance, she unlocked one of the codes from Momotaro container the Detective Boys found in Kurashiki 由 deducting that it was most likely referring to one of the statues at the Oohara Art Museum: they had to walk 25 steps from the statue towards the direction it was facing.
Wakatta! Ore ha Hattori Heiji no fan ya de!