[Kase Daiki] My Cousin, Part 1 [Full Color]

On a sweltering 36‑degree day, a schoolgirl cousin in a frilly uniform struggles with heatstroke while her brother tries to help her change into a swimsuit. She begs him to unhook her bra and pull off her panties, their bodies drenched in sweat as they lie tangled on a bed. The heat intensifies, promising a steamy summer encounter.