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!
Episode 10, "Toru's Deeply 
Mysterious Story, Part One."
".الحلقة 10، "قصّة تورو عميقة الغموض، الجزء الأوّل
Episode 10: „Tōrus zutiefst
mysteriöse Geschichte, erster Teil“.
… épisode 10 :
L’Étrange Histoire de Toru.
Episodio 10, "La storia molto misteriosa di Toru,
  prima parte."
Episódio 10:
"A Profunda História de Toru, Parte 1".
десятая серия «Крайне мистическая
история Тору. Часть первая».