Flowers for Algernon Episode 7

Hachisuka presented Sakuto at the academic assembly for his advance intelligence through the medicine "ALG". If this is administered to common people, it addresses that there will be no more things such as discrimination or war but a peaceful society. In the midst of the applause, Sakuto discovers among the audience the figure of his dead father Hisato and becomes dumbfounded. Why was Hisato there? Before long, going back to the waiting room, with Kokubo's guidance, his younger sister Karen who he haven't met for years is there. Karen who's overwhelmed in meeting again was just told bluntly and coldly by Sakuto to leave. Personally seeing that attitude, Haruka reflexively slaps Sakuto. After that, Haruka just doesn't show up anymore at the research center, disappearing from Sakuto's sight. On the other hand, knowing that if Rio uses ALG her illness could be cured, Yanagawa and Hiyama are delighted. And with that, Mai and everyone thought that Rio and Sakuto's meeting is destiny. That day too, Hachisuka and Sugino visited Kawaguchi and reported about Rio's medical treatment. About that...?