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 then, the doctor 
has been acting strange.
.منذ ذلك الحين، كان الدّكتور يتصرّف بغرابة
Seitdem benimmt sich auch
der Doktor seltsam.
El doctor se ha comportado extraño
desde entonces.
Le docteur se comporte bizarrement
depuis l’autre jour.
Da allora,
 il dottore si comporta in maniera strana.
Desde aquele dia, ele tem
agido de forma estranha.
С тех пор доктор странно себя ведёт.