Neptunia: Sisters VS Sisters features familiar RPG mechanics as players build experience with individual members of their party to level up fast and gain new abilities and skills. Although the main narrative of this game has plenty of battles to embark upon, the new friends found along the way pose an exciting challenge for players as the extra company emphasizes finding opportunities to gain XP quickly for all their allies. Through the unique social media system present in this title, called Chirper, players have many chances in each chapter to find the events they need to progress every character at their disposal.
https://screenrant.com/how-to-level-up-fast-neptunia-sisters/