Miki, 21, always gave off a studious, well-behaved vibe. We recently met, and she's usually serious—completely opposite to my personality. But once we became intimate, our relationship deepened quickly. One day, half-jokingly, she asked, "Wait, how old are you again?" When I replied, "I'm 21," she suddenly said, "You'd look great in a school uniform, wouldn't you?" From then on, I got to dress her in one. Sitting quietly on the love hotel bed, she already radiated sexiness in her casual clothes—but once changed into the uniform, she transformed completely, like a different person. She's experienced playful moments in storage rooms and on park benches, and wearing the uniform instantly brings out her erotic side. Submissive by nature, she obediently gets on all fours. Her pale, round ass and cute lingerie naturally excite my cock, making it instantly hard. Rubbing against her panties, pretending to have sex, only intensifies my urge to just thrust inside. I'm also drawn to her breasts, so I remove her blouse and tease her modest cleavage, pinching her nipples until they stiffen. When she whispers, "It feels good when you suck my nipples..." she quickly unclasps her bra, revealing soft pink areolas and plump little nipples. Her smooth, sensitive skin heightens every lick, and her moaning "Ah... un..." face is incredibly hot. Then, in a surprisingly bold move, she says, "Sit up and let me straddle your face..." I comply, and she mounts my face in a cowgirl position. At first shy, she soon lifts her skirt herself, pressing her pussy against my mouth and beginning an erotic ride. Even though she's petite, her suction is amazing. She reaches down blindly to play with my cock, gently stroking it until the head swells rock-hard. She lovingly licks the tip, eyes closed, wrapping her small hands around it, making my dick look even bigger. Then, still in cowgirl, she lowers herself onto me. Cautiously moving up and down, testing my hardness. A gentle, snug rhythm. The moment I enter, she smiles happily, saying, "I really wanted you inside..." Despite her small frame, I keep thrusting, harder and deeper. Spreading her legs wide, I switch to missionary, driving into her forcefully. Her tiny pussy drenched in thick, milky juices. She moans in helpless ecstasy, "Uuunn... uuunn!!" Tight yet wet, with surprising depth—this petite pussy is top-tier. Holding the camera, I check her ahegao on the monitor—her face shaking uncontrollably, impossible to steady. Watching herself, she simply says, "This is fun..." The eroticism of this petite girl is truly indescribable. Staring into each other's eyes, still in full cosplay, I keep pistoning—until I can't hold back anymore. I erupt violently, cumming all over her skirt. She collapses, dazed, legs splayed like a frog. "That was more intense than usual... it was good," she murmurs. I'm completely satisfied. Miki looked way too good in that costume—I need to come back and fuck her again.