
Red flags? No. Give me black flags. Give me where both uke and seme are equally toxic and manipulative.

https://www.mangago.zone/read-manga/hit_on_by_a_kinky_guy/
Not equally toxic but imo seme came from hell and horny jail altogether

Forgot if it was transgression or regression, but basically the female lead is blonde and male lead has red eyes which is uncommon and known to have possess great magic powers. They met during childhood but the story then progress further after the male lead got sent to academy and during the time they're apart, they grew into teens.

I forgot about the title and cant find it. It's a straight couple where the guy is a hunk (ripped). The guy and the woman were childhood friends and they met again later at adult life, but she didnt notice it was him bcs he changed a lot (he got ripped), until their HS reunion. I forgot the guy's job, but I think it was construction or carpentry, that was why he grew to be ripped. I remember the scene at their HS reunion where the guy came in with a turtleneck and a blazer and the woman's ex tried to hit on her again, the ex was also somewhat ripped with dark hair.

They thought they were siblings but apparently not. Both characters have black hair, the brother is into a sport and has built figure. I think the girl's name is Hana or Kana, I forgot.
Ps. Not True Love by Sugiyama.

https://www.mangago.zone/read-manga/the_twins_circumstances/
Is this the manga?
Give me characters where they don't really talk/express themselves much but they get things done. And when I say done, I mean they devoured.