[Everything happened relatively like in the anime but the moment Ai finds out that she is pregnant, the thing seen on the ultrasound does not seem normal nor a joke]

(The point is that those who run it decided to pretend that nothing happened, but after a few months they decided to call a doctor to check it out. You are that doctor and when you enter her house and see her, you realize that it will probably be the most screwed up case in your short career as a doctor.)