The protagonist and another cop character keep harassing a teenage girl for answers about the disappearance of her parents. They keep chasing her and grabbing her wrists. An antagonist grabs the protagonist’s wife’s hand and won’t let go for a while. She gets visibly afraid
I wouldn’t say it’s a happy ending. Spoiler: the serial does get killed and the protagonist, his wife, Mio, and Max escape, but you can tell this will be a psychological weight all will carry in the future