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!
Since Momiji-san has one, 
all together we have five.
.بما أنّ موميجي-سان يملك واحدًا، فمجموع مفاتيحنا خمسة
Da Momiji ebenfalls einen hat,
Como Momiji tiene una,
tenemos cinco en total.
Momiji en possède une aussi,
Visto che Momiji ne ha una,
 tutti insieme ne abbiamo cinque.
O Momiji-san tem mais uma.
Поскольку ещё один ключ у Момидзи,
всего их у нас пять.