The caster only sets the basics, such as emotions, which the victim should feel.
However she loses a lot and can't compete with Kaede's bets anymore.
She became popular in her class as she is surrounded by her fellow male classmates.
Yumemi acts very sweet and cute but Yumeko sees through her façade; the reason for this being that she had found a threatening letter addressed to Yumemi earlier in a trash can.
If Yumeko wants to achieve something, rest assured, she will.
And all of it is a bit related to her perfect memory, which act as a base for this, she never forget a thing.