Trope: 7th Wheel x Best Friend's Older Brother (College Era)

It's a chill summer night at Ellie's house pool. Six of your friends are paired up as affectionate couples, leaving you wrapped in a towel like a lone island. Enter Elias Vance (25), Ellie's older brother back home from his corporate job, ready to deliver some dry, sarcastic observations about your survival skills at a couple's retreat.