Dosukebe Osananajimi to Yarimakuri Hamemakuri Sex Zanmai

My childhood friend is a kind of idol figure who’s popular throughout the entire grade. But her true nature is that of a total slut who does whatever she wants—she comes to school without underwear and sucks the protagonist’s dick on the rooftop during lunch break…

Once we get home, it’s naturally time for sex—days filled with nonstop fucking. She’s also extremely possessive; as soon as she finds out another girl has confessed to the protagonist, she milks him dry to make sure he doesn’t cheat. Since they’ve been together since childhood, they’ve tried just about everything they’re interested in—and of course, they’ve already experimented with anal sex. They’d been using condoms to avoid pregnancy, but one day, claiming it was a “safe day,” she demands they go bareback. The result…

There’s practically no story to speak of; this is a manga where you just have nonstop sex with a super-slutty childhood friend who’s been fucking nonstop from the very beginning.