Three pairs of male and female college students who met for the first time gathered under the pretext of a "psychological study"! They stay connected by a "red thread" all night and live a super close life to see if they will fall in love! The distance between Kokoro gradually shrinks while they are "connected" to the toilet, bath, and watch adult videos, even though they feel embarrassed! They are embarrassed by their erect penises, but their sexual desires cannot be suppressed! Please watch the raw sex of these impromptu couples!