Four women who are cool on the outside and scorching in bed. Haruka, a 21-year-old office worker, looks demure but gets wild when she drinks; her pale northern skin is exceptionally sensitive. Yuuna, a 28-year-old nursery teacher, follows instinct and timing into a rebound one-night stand. Inami, a 20-year-old part-timer, discovered sex after a late first experience and now cannot get enough. Hoshimi, 23 and working in beauty, looks like an elegant lounge hostess but loses control with older men, revealing an irresistible gap between poise and messy orgasms.