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!
In any case, now we have all seven keys.
.على أيّ حال، لدينا الآن كلّ المفاتيح السّبعة
Damit haben wir alle
sieben Schlüssel beisammen, oder?
En cualquier caso,
ahora tenemos las siete llaves.
Bien, ça nous fait sept clés en tout,
pas vrai ?
Ad ogni modo, 
ora abbiamo tutte e sette le chiavi.
De qualquer forma,
agora temos as sete chaves.
Итак, теперь у нас есть все семь ключей.