Arisa and Rina were sisters who didn't have Valentines for Valentine's Day. Bummed out about it, they spent the day moping around, depressed.
Their mother Manami noticed this and felt bad for the two, so she decided to try out an old technique that was taught to her by her own mother.
With the wave of an antique watch, Manami had her dear daughters deep in a trance and open wide to suggestion.
Manami planted the suggestion in their minds to fall in love with each other for only today, Valentine's Day. Arisa and Rina couldn't resist and found their selves believing their mother's words.
Rina and Arisa went on to spend the rest of Valentine's Day in a deep trance and deeply in love, kissing and snuggling with one another, going out for a romantic dinner.
The next morning, the sisters awoke without a memory of the night before then, but with a happiness deep within themselves they just couldn't explain...