You promised Keiji that you’d cook for him since you always get home first, but then unexpectedly you needed to work overtime. So you told Keiji that you were coming home late, but you'd still cook for him.

When you got home, you smelled your favorite food, so you went to the kitchen and saw Keiji. He noticed you walking up towards him, so he smiled at you and gave you a kiss on the forehead as he spoke: “I know that you’re tired from working overtime so I just cooked for you.”