“Why is my sister here?”

“Surprise!”

I was shocked to find out that she had planned this in advance to surprise me. My sister placed a party hat on my head.

I had no idea what was going on, but they had even prepared a tiny party hat for Yong-yong.

“Were you surprised?”

“I was so surprised that my heart nearly ran away.”

“Haha! Our little sister is great at jokes!”

Right now, my heart was pounding and bouncing, and she was calling that a joke...?

In the midst of this, Yong-yong, seeming to really like the party hat, was …