Substitute Alpha and Miracle Child

While running a small herb garden, Omega Kairi raises Juju as single parent, who was born by his twin brother Airi. They spent happy days even though they are poor, but one day Hubert, a British aristocrat, appeared, saying, "From today, that child and the store are mine." He was Airi's first love who met when Kairi was acting as a substitute to hide Airi's pregnancy. But Hubert doesn't know that the two have been replaced...

"I beg you, raise this child with me as my wife..."
His first love appears in front of Kairi, who is desperately trying to raise her brother's memento.
However, Hubert mistakes Kairi as his older brother...