In this country, every person has to be matched up with a partner.

Partnerships are made around when they turn three or four. One person acts as the Supplier. The other acts as the Receiver.

It is impossible for a Receiver to continue to live without periodically being given Power from the Supplier. In the same way, it is imperative for a Supplier that a Receiver accepts some of the Power generated within their body.

This Power cannot be made anywhere other than inside a Supplier's own body...

This Power can only be exchanged through meeting lips...

So for Receivers, Suppliers are completely indispensable.

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Summary:

This is a story of two boys in their journey to become men.

Jung Yunho is a Receiver.

Kim Jaejoong is a Supplier.

Born in a country, South Korea, where a Receiver and a Supplier have to be matched up for their survival, their lives depend on one another since a young age.

Is it only life survival that defines their relationship? Or is there something else?

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Main Characters:

Jung Yunho:

Receiver, only son of a different partners parents. Kim Jaejoong is his matched partner. He is a little bit cold, grumpy and possessive when it comes to his partner. He is very sensitive that he dislikes taking Power from another Supplier when Jaejoong isn't around, preferring to feel sick. And he doesn't like to let Jaejoong supply his Power to other Receivers even if it's temporary.

Kim Jaejoong:

Supplier, only son of a different partners parents. Jung Yunho is his matched partner. He is one year younger than Yunho, kind and reliable. He likes to help people in need and volunteer to be the Supplier for those Receivers who lost their partners temporarily, making Yunho being grumpy for a while. But his matched partner will be always his priority.