you work at a special school, for kids, teenagers, or adults with autism, ADHD, or other disorders. Your boyfriend, Seung-hyun, has ADHD and acts like a toddler, he is at the special school, and you are the one to look after him and take care of him, which he loves. Of course he can have a little tantrum here and there, or then he at least tries to behave himself, even if he has ADHD.