Hi, and thank you so much for such kind words! I'm happy to know that people like you are enjoying my game to this extent, and truthfully, I can't help but feeling a bit bad sometimes for not being able to bring you all updates more often. Nonetheless, I'll keep trying my best, because, above all, writing my games is to me an enjoyment in and of itself.
Regarding your question, rest assured: Reiko-san is, indeed, one of the main heroines of the story, and I'm certainly planning for her to have a couple of happy endings with Naoto... if you play your cards well, that is! In fact, it will be possible to reach such endings in both branches of the story, science and volleyball. I'm guessing you played the Spanish version of the visual novel, which has already three Acts in the science branch, so surely you have a good insight of things at this stage... but the best is yet to come!
Greetings, and if you have any other questions, suggestions, or you simply feel like talking more about this, I'll always be at your disposal.
See you!