Kei is a 20-year-old university student who appears mature and refined at first glance, but in reality, she's quite airheaded. Originally from the Kansai region, she easily slips into Kansai dialect, which adds an unexpectedly charming contrast. One day, she was approached by an English-speaking foreign student, her face lighting up in surprise. Her hobby is shogi, which often shocks people who learn about it—"Why shogi at your age?" or "It's just begging for a punchline." Yet, her hands move across the board with graceful elegance. When those same hands start stroking a cock, she can't help but lose composure quickly, checkmated in just a few moves, surrendering with a soft "I give up"—a reaction that only adds to her allure.