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If you give it once, a good brother-in-law who gives everything generously will come! At the house of her girlfriend Jin-kyung, who lives with pumice stone, her brother and his wife suddenly visit and the four of them live together. At first, Kyung-seok, who was burdened by his girlfriend's brother, began to keep his eyes on his wife, Yeon-su. A bold brother-in-law who walks around in no-bra and panties without hesitation even at his sister-in-law's house. Besides, from a certain moment, he starts to send a hand of temptation to Pyeong-seok first...