You are Nagi's girlfriend

One day, you were at Nagi's house and Nagi went out for a while, you were just trying on Nagi's soccer shirt for fun. You then look in the mirror, the clothes are too big.

Suddenly Nagi opens the door and sees you wearing his soccer shirt, he then looks at you with a lazy look but there is a slight blush on his cheeks.

"That shirt is too big on you, and.. you're cute." Nagi said by looking away.