The limited-edition of the 26th manga volume will include an anime adaptation of the popular special flashback chapter "Uchi ga Kita Machi" (The Town Where I Arrived). The story reveals how Haruto, Akari, and Takashi first met during childhood, and serves as a prologue to the TV anime. The 27th limited-edition manga volume will include a special anime episode produced in full cooperation with Seo Kouji. This OVA will be the animation of the end of the manga. (Volume 27 is the final volume of the long-running series.)

Serial murders involving all kinds have happened. All the victims are from a Music School led by a famous pianist. Conan and company have been invited to a opening concert of the Music Hall built by the pianist. The biggest attraction of this concert is the world famous violin called "Stradivarius" and a special appearance of a singer who has perfect pitch. 

(Source: ANN)

After Niche carries the wounded and stunned Lag back to the Bee Hive, the Letter Bee finally begins to piece the puzzle together. Now he knows what's happened to Gauche, why the Marauders are so focused on stealing mail and the actual intent of the group controlling both, Reverse. However, when he's forbidden to reveal the truth, Lag is soon forced out of the artificial sunlight and back into the world of perpetual night. And soon Reverse's plot to take down the Letter Bees and overthrow the Amberground government begins to accelerate. If things weren't already bad enough, the giant insect creatures called gaichuu are apparently evolving into something new; there may be traitors working within the Hive; and Niche's sister, who's definitely not human friendly, shows up to turn family drama into a full-scale siege! It all spells serious trouble for the Letter Bees, but if anyone can weather the storms and gloom of night, Lag and his team are the ones who'll deliver. (Source: FUNimation)

Ichigo Mashimaro encore is a two-episode OVA continues onwards from the previous set of OVAs of Ichigo Mashimaro.