For as clichéd as this episode is, Connie letting Masato live didn't let him suddenly stop the attack. Sure she fell for him in a weird way but she's smart enough to know one guy with a broken leg doesn't matter.
Amnesia is such a common trope in fiction that I don't mind its occasional goofiness, but I can't help chuckle a bit at how Masato remembers nothing about himself but is okay with this GREEN SKINNED woman. I'll forgive it because Connie is so tsundere its great.