I'm a part-time worker and currently live with my older brother and his wife. My brother is a salesman working for a trading company. He's always busy meeting his quota, so he gets up early in the morning and comes home late. Sometimes he doesn't come home at all because he has to work overtime for so long. That's why I spend a lot of time alone with my brother's wife, Yu. Yu is beautiful and kind, and treats me like a friend. However, ever since I saw her like that, every day has been awkward...