I just want to have her fall completely for him and still be tsundere about it, before he reveals that he is the newly reincarnated hero. Watching her brain implode from that after the way she acts would be the best way to draw that to a close.
Also, I love it when male MCs are this straightforward and nonchalant about complementing the female MCs. Reminds me of Soredemo Ayumu wa Yosetekuru in that way.