Sister Teaches Brother to Be Adult: Intimate Sleepover

Feeling lonely with her husband's business trip delayed for several days and her own sister away on vacation leaves Ai Sayama craving intimacy. When Kazuo arrives to stay at her home for three nights—a diligent student desperate for sexual release—Ai immediately targets him. Despite her undeniable allure and seductive advances from her side of the bed (or rather in the lingerie), Kazuo remains stubbornly resistant to being swayed by his older sister's charms. Realizing seduction isn't enough this time around, Ai employs her ultimate tactic. While Kazuo is fast asleep in his room clad only in boxers (implied by context), she sneaks in wearing delicate lingerie. Utilizing all her practiced sexual skills, she completely overwhelms him until he can no longer refuse. Ai successfully claims his virginity by slipping a condom on him before beginning their passionate encounter. However, Ai has awakened a primal lust beast within Kazuo! He thrusts his hard, bare cock deep inside her, flooding her core with years of accumulated semen. Ignoring every plea from Ai, he relentlessly takes her over and over again throughout their three-day stay. They are inseparable; nearly constantly entangled, with Ai’s insides perpetually saturated by the thick flow of Kazuo’s potent cumshot.