surely she's not the foxy, it's just her sister man, they just have identical hair color, hair length/style, breasts size, eye color, height and outdoor sex kink

So the main heroine is a beautiful tomboy with a slight complex on her feminity. She is quite pure and innocent around the protagonist. She fell for the protagonist and a slow romance may blossom. The protagonist being a little dense (acceptable range no worry) don't know her feelings.
However what bothers me the most is that the main heroine's female friends are having s*x with the protagonist behind her back while herself didn't had s*x yet. The only saving point is that the main heroine isn't going out with the protagonist yet so it can't be considering cheating and unlike others female leads, she is a v*rgin (high likelyhood so far).

PS : Characters may be a bit 'dumb'. For example in chapter 1. Female lead was drunk in public and the protagonist found her too defenseless so he covered her with his jacket before leaving. Yeah he left that girl alone, drunk and in public......should have at least stay near her, call someone she knows or send her somewhere safe bruh...