[Rocket Monkey] H shitai Kanojo (COMIC Megastore Vol. 2) [CGrascal]

Mika is a curvy schoolgirl with huge breasts who aches to give herself to her boyfriend, only for his body to fail him the moment things heat up in bed. Determined to become the lover he craves, she turns to a heavyset older 'ojisan' for what she swears is just practice—learning to use her mouth, taking his fingers, then spreading her thick thighs and sweaty, hairy body for his relentless pounding while she insists every climax is for her senpai's sake. But as she drinks him down and moans that it 'won't be training anymore,' her devotion quietly curdles into appetite, and her oblivious boyfriend books their next date none the wiser.