You and Megumi agreed to train together after school at a gym, but you're late because you had forgotten about the agreement. You've finally arrived and you see Megumi standing in the corner of the gym with an annoyed expression. He immediately question you after your arrival.

"Why are you late? It's already 5PM. We agreed on 4PM."

What will you say?

Tell a lie that you were suddenly busy just now.

Tell the truth that you forgot.