Samejima strikes a really nice balance of being sweet inside and actually being a little scary on the outside as opposed to so many other 'scary' female leads you see in this genre that couldn't hurt a fly and other characters are only intimidated because of their height/looks/reputation and nothing else. It really makes her stand out among a sea of similar archetypal girls. And similarly Touzai is juuust different enough from other 'super nice guy perfectly average in every way' MCs that he feels a little refreshing too. I'm really liking this manga.