Although the official hints and walkthrough by Ben Woodhouse say that it does
not really matter which gift you give which girl but only depends on how much
she already likes you, I'd still guess that there are more reasons for their
reaction; if she already loves you, she may accept just any gift - if she hates
you, she may reject any. There are a few facts which may be less important but
probably not useless:

- Stuffed animals are not quite a gift for a young-to-adult girl...

- Hitomi has a strong self-confidence, she is no kid anymore. So she will
  call you nuts if you try to give her just an apron with a theme of a
  child comic: She deserves precious metal "accessories".

- Sanae is the childish puppet of the three girls; not yet a woman, still
  naive without clear goals in her life. She is not yet ready for a candle,
  but instead adores the beautifully designed apron.

- Azusa has a metabolic disease (diabetes, IMHO); so she may not get happy
  with sweet candy ("present set from a famous shop"). But she is already
  quite adult and rather romantical; in a good mood, she knows how to use a
  sweet smelling candle.

These ideas may or maynot help you - but I wish you good luck.

LigH