It must really suck to be a beautiful Japanese schoolgirl.
To her, friends and boyfriends exist only so she can use them for her gains. As in capital gains. Rio is only interested in money, until the day she meets 35 year-old college professor Kouki (Shosuke Tanihara) and falls in love for the first time.
Confused by her emotional change and alien feelings, this emotional cripple decides to expresses her love to Kouki honestly. Although Kouki becomes interested in Rio there is a reason he can't pursue the relationship... to find out why, you'll have to catch this delightfully charming film yourself... just be sure to get the version with English subtitles. Here is the trailer, with Chinese subtitles.