The merchant does not offer to get the Water Lily Ingredient for the "amphibian Breeding Tonic" I am stuck. I have slept, talked to everyone, progressed everyone until there is no more content but Lazuli keeps telling the Merchant's son "No not yet" when he asks if I need anything. Tsuyu is just eternally in the gym with the rabbit. I feel very stuck. Any hints?
The water lily isn't gotten through the merchant's son, I think its at the back of the school (If I am remembering correctly). Just go outside the front and follow around the left side.
For future reference, it seems that the merchant's son only gets you the MAIN ingredients and not any of the reusable ones.