Imaizumin-chi wa Douyara Gal no Tamariba ni Natteru Rashii 6

As usual, Imaizumi was spending his days in sweet, lovey-dovey sex with the gals, but one day, when he and Ruri finally end up alone, she makes him promise her a proper date. Having come to cherish every moment spent with Imaizumi, the second they get back to the apartment, Ruri starts an intensely passionate session of sex so hot their bodies practically melt into each other… Feeling nothing but love, Ruri overlaps their bodies again and again, cumming over and over. But the other gals notice that the two of them are fucking…!?