Nai-chan, who lives in the same apartment building, has big breasts, a boyish charm, and always wears a cute smile. Every time I see her, she's with a different man. It turns out that Nai-chan is an insatiable slut, constantly changing men to fuck. Knowing this, I wanted to grope her big tits, lick her, and have sex with her too. So, I sneaked into the sister's room…
