Top 9 in Top 22 best Shounen Ai manga you should not miss.
In this country, everyone has to be paired with someone. You are matched when you are three or four years old. It is the doctors who decide who you will be paired with. Two people of the same generation, if the wavelengths match, will form a pair. One is the "provider", and the other is the "receiver". The receiver will not be able to live without regular energy from the provider. Likewise, the provider needs to transfer some of the energy from their body to the receiver. This energy is only produced in the body of the provider. So for the recipients, the providers are absolutely indispensable.