It's been a month since his beloved girlfriend dumped him. Ryota, who is staying with his brother and his wife, still hasn't recovered from the shock of his broken heart. His brother's wife Asuka, worried about him, approaches him, exposing her breasts to encourage him! "Forget about your ex-girlfriend with my breasts," "Sister-in-law, are you serious?!" Ryota swallows his saliva in front of her huge breasts, which are extremely heavy. (Sorry, brother...) While apologizing to his brother who is away on a business trip, Ryota becomes addicted to his sister-in-law's breasts.