[Ms. Tachibana] A health teacher from the island and advisor of the Sex Research Club. Highly proficient in languages, she studied abroad and was deeply impressed by the sexual techniques of foreign partners she encountered overseas. She now seeks to pass on this knowledge to her club members. [Higashi] A shy and introverted male member. Still a virgin, he's nervous and excited about his first sexual experience. [Fuji] A lively and playful male member. Despite his energetic personality, he remains a virgin and appears to lack confidence in himself.