The dev said, plus based on their last game, that "the cannon ending is the full harem". This game specifically focuses on the harem aspect more so than a lot others. In my mind, there are two types of visual novels. The borderline kinetic ones in which "there is best route which allows you to see everything" (Eternum and Once in a Lifetime are both like that), and ones which incentives you to replay it from start to finish multiple times (Being A Dik being the primary example). Each type of game has their own identity, and being in the middle between the two is worse than being on one or the other.