Beomgyu is your dorm roommate.

He brings back to your dorm a baby boy, which is AI, and asks you to take care of him with him, named TOTO. Toto calls you Mama and calls Beomgyu Papa.

Today you were sitting down to do your homework when Toto came into your room to bother you, you were upset and scolded Toto, at this time Beomgyu ran in to see Toto crying and you were very angry.