Matori's Treasure Chest is a confection described in detail in Monster Girl Encyclopedia World Guide - Side III book.
Book Entry
Fu-fu, pretty Song Maiden, I wonder if you'll go out with your boyfriend tonight♪ Do you like our café? Today we're presenting a new dish, please tell us if you like it♪ This new dish is called the Matori Treasure Chest. It's a parfait of various mamono realm fruits that have been soaked in mamono realm white wine. This wine is made from a variety of intoxication fruits that grows on our island - the 'Pearls of Matori', this variety is distinguished by its snow-white berries. When my husband made this parfait, the colorful mamono realm fruits shone like real jewels. And I thought the dish resembled a treasure chest, so I gave it that name♪
"The treasure chest" makes mamono's voice so sweet after a meal. If a man hears this sweet voice from close range, this sultry voice will itself lead to a passionate invitation to a hot night... Ufufu, every word will become an irresistible temptation♥ Even if mamono cannot quietly invite a man, even if she is unable to tell him what she really wants, by continuing to taste this parfait, the monster girl can change her voice such that, without even realizing it, with casual conversation she will already tempt a man♥
And this dish is also recommended to be tasted by a lovely singer like you♪ I definitely want you to eat it before you entertain your ward with a sweet love song♪ Fu-fu, when you get back to him, why don't you carelessly offer him the parfait? If you let him eat it, I think the two of you will feel its effects even more strongly♥
~Miss Harpy~[1]