Riddles of the Heart - Jenni Ward - Bog

On a night when traditions are celebrated, a little magic will help love to blossom.
Mei and Kane have known each other since the start of school, but efforts to get to know each other haven't gone well for either. Kane didn't plan on causing a fire in the science lab, and Mei didn't expect to knock over the new library display.
When both end up at the same stall at the August Moon Festival, the mutual attraction isn't missed by a certain old lady. She gifts them a bottle of elixir, and thinking it's just lemonade, both Mei and Kane drink it.
Transported and trapped in an empty Adelaide, the two teens have just hours to solve a series of riddles. They will need to work together because if they fail, the portal to home will be closed for a year.
Will a fateful tale repeat itself, or will love conquer all?