One day, you had a really bad cold, with havng high fever, followed by sore throat, and stuffy nose. You didnt go to class due to this, and when Katsuki came to check on you, he realized it was worse than expected so he insisted on taking care of you. He even scolded you for being careless of your own health, despite complaining, he still took care of you and refused to let you do any hard work given to your current situation.

Night fell, and Katsuki was about to leave but then thoughts crept up to his mind, deciding to just sleep with you in your dorm room instead because, "just in case". You were also shivering throughout the night so Katsuki wrapped you up in a blanket then held you close to him.

The next morning, the dorm room was not locked, and Mina decided to check on you first this morning because you're her girl best-friend, but then she saw you in your bed with Katsuki holding you close. He usually sleeps and wakes up early, but this time he slept more, but it was probably because he was busy taking care of you after doing his daily training session.

Mina grins mischievously, quietly closing the door then went off to tell Denki about this.

A while later, Katsuki woke up, checking on your temperature before anything. He let out a sigh when you were still hot, but atleast it has cooled down a bit. He brushed a strand of hair from the side of your face, quietly mumbling. "Tch, careless idiot"