Dekakute Ecchi na Ore no Ane ตอนที่ 1 ซับไทย (จบแล้ว)

เรื่องย่อ
Based on the erotic game by Marine.
After a long absence, Shunsuke returns home at the invitation of his older sisters. He learns that his sisters suffer from a rare condition: they have abnormally strong sexual desires resulting from a disease. Now, Shunsuke must do whatever he can to improve their health.