Omg comon guys, didn't you play husband and wife when you were young with your sibling or old people. This manga is so pure. I'm sad that we can't live as innocent as in the past, when children can still kiss their parents, grandparents, or hangout with genuine adults and no one would interpret it in a dirty way in the name of protecting the child. I mean those people just worry about the child but sadly our society is heading to this direction cuz things are so different in the past.