Here, a keyword is made to have the hypnotized go back to her normal age and consciousness, and to believe strongly what she's told in a certain way, then from the baby, she's made to imagine that she is in an egg, then coming out of it as a little chick, then becoming an older bird later.
After that, she's made to get back her consciousness, and get angry over her changed clothes.
While she's changing out of her clothes, her sister make her turn into a frog, then catch a fly (don't know if it was an illusion or a real one).
Then the hypnotized is made to go back to her normal consciousness and wear a costume, and as she express that she now believe in hypnosis and is worried about what's done to her, she's brought to a trance again.
At this point, it's confirmed that the one doing the hypnosis is called Yumi, but I still don't know if "the hypnotized" is Rin or Aya or something else.

Base +3