hmmm, to be honest, I don't know how many points you need, I've been using unren for a while so I have plenty of points for my game. The last time I had a problem with points was when I needed to get 21 points with Dylan for Sophia and Dylan to share the bathroom, after that, I put enough points for my main route.
I don't know if it will take points in order to progress in the side story. I was under the impression that the bonus side story was going to be without Sophia's presence so there isn't any need for points, at least that's what I think. Maybe the bonus story won't have any decision making, or points to grant Sophia and be independent and just be between, for example, Dylan & Ellie. I don't know how many points does Ellie has in the game so far, 22 you say? Maybe there have been more stuff to do between Sophia & Dylan and that's why he has been getting more points so far, I can not tell for certain since I don't play any other paths and I started to use unren.
I hope that the bonus story is about Dylan & Ellie, I guess is well overdue a reconciliation, maybe it's already underway if Dylan with points cooks dinner for him and Ellie in one route.