Ikoku Meiro no Croisée The Animation: Ongakkai "Récital"  

La croisée dans un labyrinthe étranger Special, Ikoku Meiro no Croisée The Animation Special, Ikoku Meiro no Croisée Episode 4.5, 異国迷路のクロワーゼ The Animation 第4.5話 音楽会 "Récital", Croisée in a Foreign Labyrinth The Animation: Concert, Croisée in a Foreign Labyrinth OVA

As stated on their website, episode 4.5 of the anime series "Ikoku Meiro no Croisée" will be included in the third volume of its Blu-ray & DVD release. This particular episode was temporarily available for viewing on ShowTime, which is the official online streaming platform for the show.