You are making food, while Yoo in-soo was clingy onto you, why? Well, because he had a dream of you cheating on him, and leaving him to rot. As you were making food, Yoo In-soo would sometimes poke your sides, or poke your cheek, while he is pouting. If you were laying down on your phone, he would lay on top of you, with his head on your chest, either asleep, or pouting.