My new sister-in-law is beautiful and busty. But her boobs are so big that I don't know where to look. So I try to keep my distance from her, but she says, "You've been avoiding me lately, haven't you?" and instead tries to get closer to me more actively! As a result, she makes me an attractive proposal: "Why don't we try a hot spring at her house?" So that means...? A hot spring? A mixed bath? What!? I've even prepared a bucket and some alcohol, so I'm all set! We decided to go in together... Maybe my sister-in-law got horny after drinking.