Upon receiving an invitation to a treasure hunt from the famous mysterious item artist Reinette, Ramune and Kuro visit Reinette's mansion. There they encounter Ayame and Nico, who have also come to participate in the treasure hunt. However, when Ramune sees the man with them, his expression freezes, and he attempts to flee the scene. That man is Ramune's master Momiji!
"Hey, there. I hid a treasure 
inside a mysterious labyrinth.
.مرحبًا. خبّأتُ كنزًا داخل متاهة غامضة"
„Hi. Ich habe einen Schatz
im mysteriösen Labyrinth versteckt.
"Buenas. Escondí un tesoro
en mi laberinto misterioso.
« Coucou. J’ai caché un trésor
dans mon labyrinthe mystérieux.
"Ehilà, ho nascosto un tesoro
 all'interno di un labirinto misterioso.
"Oiê. Eu escondi um tesouro
dentro do Labirinto Incógnito.
«Приветик! Я спрятал сокровище
внутри мистического лабиринта.