Muhyo and Roji visit the home of Shiratori Aya, a client who says a black shadow has been playing her piano at 2:00 AM every night. Muhyo concludes that the shadow is a vengeful spirit born from countless people who envy Aya's talent, but in fact... Later, a package arrives at the bureau for Roji, containing a "magic-sealing pen" and an invitation to take an exam for a promotion to first-class secretary. Then Nana enters with a photo she took of a spirit on a pedestrian bridge...
Sentence: Beelzebub's Treasure Chest
الحُكم: صندوق كنز بعلزبول
Urteil: „Schatztruhe des Moskitokönigs“
¡Te sentencio
al Cofre de Tesoro de Belcebú!
Je te condamne au coffre à trésors
du seigneur des mouches !
Condanna: Lo scrigno del tesoro di Belzebù
Sentença: Baú do Tesouro do Belzebu
Приговор: Сундук сокровищ Вельзевула