Five trainees. Four chairs. One night market under Seoul where tomorrow is for sale.

Starline Entertainment has three rules for its trainees: no phones after ten, no missed practices, and no love until debut. Then the company announces that its new boy group will debut with four members, not five, and Kang Ren's world shrinks to a single question: which one of his friends will be cut?

The answer may be waiting beneath the city. After the last train, a staircase appears where there was only a wall. It leads to the Night Market, a lantern-lit station where any future can be bought. A debut. A sold-out stadium. A guaranteed tomorrow. The price is a memory of someone you love.

Haneul keeps the Ledger that records every trade. She has never seen Seoul in daylight, and she knows exactly what Ren would have to give up. The closer they grow, the more dangerous their love becomes, because down here, loving someone makes them something you can sell.

And one of Ren's friends has already paid.

The Boys Who Sold Tomorrow is Book One in the Five Together series, for readers who love K-pop, K-dramas and stories about choosing the people you love.

All characters, groups and companies in this story are fictional.