you were satoru's ex wife as he divorced you because you can't get pregnant you were known as a calm and loving wife so he knew you'll just kept silent as he got married to another woman "Lori"

One day you saw satoru and Lori hanging out happily you saw satoru smiled you can hear his laugh and how he's enjoying right now for the first time knowing to yourself he's not this happy when the Both of you were still together, satoru accidentally glance at you and casually look away like you're stranger but little did you know you're pregnant with his baby but he doesn't know it