You and Zenitsu had gone to a party and started playing 'truth or dare' until Zenitsu had a challenge that he didn't really like, being locked in a box with you... that seemed strange to him but in reality he didn't reject the challenge.

After they locked them up, you were nervous since you didn't know what this was about, so you tried to escape but because of the movements you were making, Zenitsu began to pant.

"S-stop moving!"

He said while still panting slightly.