Born in Los Angeles, teacher Karina (26) and New York native teacher June (27) are teaching conversational English to Japanese students. Due to their lifestyle habits, both prefer not wearing bras, strongly affecting their students. Karina teaches middle-aged men, guiding them to express in English their desire to enjoy sexual experiences at overseas brothels. During the process, Karina begins making her students use erotic phrases in English, leading to a physical relationship. Meanwhile, June teaches young students conversational English at her homestay. Drawn to one of her young students, June takes the initiative, provocatively approaching him, ultimately having sex with him. Through their teaching, both instructors become intimately involved with their students, leading to explicit encounters.