"Thanks for letting me borrow your clothes."

Riddle adjusted your shirt that clung to his body while he stands in front of the mirror in your room.

It was raining cats and dogs outside and Riddle was just so happend to head back from the Botanical Garden which had led him to get soaked in the rain.

With no other choice, he made his way to Ramshackle Dorm, since it was the closest, and asked you to stay for awhile.

You gave him your clothes for him to change to so he won't catch a fever.