Make amends? While actively two-timing by having two girlfriends at once? Walking into this chapter one would think Haruno didn't exist by the way Riku's been acting, but he's just a shitty playboy now at this point. Nevermind that he also completely forgot how he was (wrongfully) furious at Ayana for somehow being connected to his parents' deaths.
Why don't they just up the trashiness and turn Kana into yet another love interest too, at this point turning this into a harem would really go well with the trainwreck. All three main characters are probably already clinically insane at this point by how they easily do emotional 180s, only Kana is seemingly sane. For now.