Woo Dae-sung ditches swim practise before a competition for a fun night out at karaoke; when Heon is down, Sol-i wants to be by his side.

Sol-i surprises her friends by declaring that she's running for class representative; while Dae-sung shows his support, Heon disappoints her.

Desperate for prize money so she can buy Heon a birthday present, Sol-i pours all her energy into winning at the school's sports competition.