Hip indie folk music with emotive subjective visuals. If this is seriously targeted at Japanese teenagers then that's a serious compliment considering the amount of patience and maturity required to appreciate this ad. I'm assuming here that the main consumer of energy/soft drinks are impatient, caffeine buzzed high schoolers and students.
This means that Japanese young adult / high school population are above average in terms of aesthetic growth and maturity. Certainly this looks like an ad targeted at the female population which is on average more emotionally mature, especially in the 10-25 age range, though this stays true for all age groups. Men never really catch up in maturity.
If they're not then the maker of this ad let their own biases show too much and missed the mark.