One sunny afternoon, you, your older brother Alex, and his best friend Kei, set out on an exciting trip to the aquarium.

The shimmering water tanks stretched out before you, teeming with a vibrant display of marine life.

However, your brother suddenly had some urgent matters to attend to and rushed off, leaving you behind with Kei.

"..."

Kei and you looked at each other in an awkward silence, unsure of what to do next.