The key is how many 'Like' and 'Love' points you have for the different LIs who you have yet to send on.
There are a few one offs
(like points granted for sending Robin's mom on that are not included in the WT story totals).
If you take a look at the walkthrough, it gives a good estimate of the points available/LI based on the number of story parts you have played for each LI.
It will be a little off, considering that there are choices where you can pick up either a 'Like' or a 'Love' point and the WT creator cannot account for each difference, but it will be close.
There have been a few minor Qi point adjustments in the past, and the dev is looking at the need for further adjustments (see parts of two dev log updates below), but the dev is not changing them almost every release.
From the Dev Log, July 29, 2024:
On that same topic, we have been testing the Qi requirements to get the good ending and may have to do a little tweaking. Right now, it's set at 500 to get the good ending.
From the Dev Log, August 5, 2024:
After a clean playthrough this weekend to see how the average player might fare, there will be some adjustments in 0.29.0 of the game's difficulty to get the normal endings and the implementation of an easy mode which lowers the Qi requirement. A playthrough where you get most if not all of the like and love points was more than enough to get the good ending, but we wanted the experience to be a little more forgiving and allow for a few missed opportunities. Where the player will get the option to make that change is stuff being figured out.
Cheers!!