Recently feeling out of shape, I decided to start jogging with Riina, my semi-live-in girlfriend. But on the first day, I couldn't be bothered to go outside. Even as Riina urged me, "Come on, get ready already~," my body refused to move. Finally, she said, "Ugh... I'm going ahead!" Seeing her about to leave, I felt bad about staying behind. So I stopped her, pulling her into a cuddly make-out session to distract her and sweet-talk her into waiting. Riina, already pumped up and doing warm-up stretches, bent forward and asked, "Can you push down on my back?" While helping her stretch, I caught a glimpse of her cleavage peeking from her sports bra and instantly got turned on. Without thinking, I grabbed her tits from behind. "Hey, stop that~," she protested, but as I pinched and rolled her nipples, she gradually began moaning softly. Seeing her react so nicely only made me hotter. I thoroughly enjoyed the feel of her soft mounds through her workout clothes before pulling out her bare, silky breasts and squeezing them tightly. Her cheeks flushed as she started to enjoy the stimulation. Next, I moved to her lower half, groping her ass and pussy through her tight spats. She responded sensitively, and when I offered my cock, she obediently licked it, turning us both on even more before moving into a titfuck. Rock-hard and on the verge of exploding, I couldn't wait any longer—I pushed her down, checked how wet she was with a quick hand job, then entered her from above. She quickly reached orgasm as I pounded her insides. Gazing at her blissful expression, I finished by making her ride me in a titfuck, shooting my load deep into her cleavage. Taking advantage of her weak resistance, I lazily had my way with her all day—squeezing, fucking, and indulging in every inch of her big-titted, pussy-pleasing body in a full day of titty-fucking fun.