People become afflicted by "mysterious diseases" when their hearts and minds are affected by "the mysterious."
Koto, a girl who produces mayonnaise from her eyes, visits Dr. Ramune, who specializes in these diseases that can't be explained by modern medicine.
She was brought to the clinic by Ramune's apprentice Kuro.
Koto explains that she also cries condiments other than mayonnaise, and Ramune offers her a mysterious treatment.
Drink something poured from that, and 
you'll only be able to speak the truth.
.اشرب شيئًا مصبوبًا منه، ولن تستطيع قول سوى الحقيقة
Wer einen in ihr zubereiteten Tee trinkt,
kann nur noch die Wahrheit sagen.
Si bebes lo que contiene,
no podrás decir más que la verdad.
Si bebes lo que contiene,
solo podrás decir la verdad.
Quiconque boit son contenu
est obligé de dire la vérité.
Se bevi l'infusione che ne esce, 
 potrai soltanto dire la verità.
Ao beber algo que saiu dela,
você só conseguirá dizer a verdade.
Выпьешь заваренный в нём чай,
и будешь говорить лишь правду.