The problem is not the days, nor the time that passes within the game... the problem is the lack of creativity to create the scenes.
I have a theory that since the dating app appeared everything started to get worse
Come on, it's a camp!...where is the typical scene where the mc goes to bathe and suddenly Eve enters by mistake and sees the mc naked?...that scene would be much better and hotter than what they have done in the last chapter.
At first the game aimed for that, little romance and mostly creative, cool, fun, hot scenes, etc... however, none of that happens anymore, that's why the game has declined, too much romance and so much LI is already overwhelming.
Each game is different, summer heat is one thing on the outside and another on the inside, they must go back to basics and improve again... today it is just a failed romance game and people don't like it.