Part-time jobs are an excellent way to earn Yen and boost your Social Stats simultaneously. They become available at various points in the game and are typically found at the Port Island Station or Paulownia Mall. For example, working at the Chagall Cafe boosts your Charm, while working at the Screen Shot movie theater boosts your Academics. The 'Wild Duck Burger' job boosts Courage. While they consume a time slot (day or evening), the dual benefit of money and stat increases makes them a worthwhile investment, especially early on when your Social Stats are low. Some jobs also unlock specific Social Links, such as the Tower Arcana (Mutatsu) being unlocked by working at the Club Escapade.
