It seems it's not the tennis club but the penis club (lol) Using the pretext of "I want to hear about today's girls' love lives," she gets lured into a room, and even when the questions turn naughty under the guise of love talk, she doesn't show a hint of shyness—smiling and answering everything freely. That dynamic is absolutely the best.
Apparently she's in a tennis circle at university, but the center of her interest seems to be less about tennis itself and more about penises. Even when a dick is suddenly thrust in front of her face, she doesn't flinch and bursts out laughing. She rolls his balls around in her palm like she's bouncing a tennis ball—her easygoing vibe honestly earns total respect.
After that, when her soles and armpits are touched and licked, it turns out she's extremely ticklish. The sight of her writhing in agony while cracking up almost looks like a form of torture, but her desperate expression is actually cute, and watching her makes you smile too.
Then her panties are pulled off, she's seated in a chair, put in an M-legged spread position, and made to say, "Hi! I'm pussy!"—a situation that's already beyond comprehension. When a dick is suddenly inserted, at first she can't stop laughing for some reason, but once the thrusting gets rougher, it shifts into moans, and she comes in no time. That gap is truly impressive.
Even during sex, when spoken to, laughter keeps welling up inside her. She giggles while getting fucked, but with every thrust she repeats ahegao orgasms. Even after being creampied, she answers with a beaming smile, "It felt great and it was fun, so totally okay!" so you can enjoy the whole thing in a lively, bright mood.
And at the end, she's handed a toy tennis racket and given the ridiculously forced prompt "Say one word while you smash!"—to which she yells with full fighting spirit, "I don't have enough sperm!" She's a girl who belongs to the "Penis Club" with a perfect score in personality. You rarely come across an erotic work this fun and energizing (lol).