[SDMU-180] If a stranger man and woman spend the night while being tied to a 30 cm red thread ... Will it catch fire and fall into the first meeting SEX? Season 2 (Censored)

Three pairs of male and female college students who met for the first time as monitors for the "Psychology Survey". While tied with a 30 cm red thread all night, we will have them live a thrilling and close-knit life alone, and we will verify whether they can grow in love! Watch the innocent appearance of the two people, who are not allowed to remove the red thread in the toilet, bath, or futon, gradually shortening the distance!