My First Sexual Experience Was With My Older Sister's Boyfriend, -Don't Cum Inside Me With Her Right Beside Us...!

"You can't cum inside me, my sister's right here...!" -- Mami was taking care of her passed out drunk older sister and her sister's boyfriend Daiki. Suddenly she felt Daiki's hand reach out towards her... "Hrg mmph!" His tongue slid his way inside her mouth. "Does he think I'm my sister!?" As he violates her with his wet kisses and rolls her sensitive nipples in his fingers...she feels something burning hot slip around her underwear and into that dripping honey pot! "I can't hold back...cumming! I'm cumming!" But it was just an accident that happened because he was drinking... that's what it was. Or was it!?

(Source: Eromangajima, translated)