The Son of God in Past and Present Life

The male protagonist and his younger sister live in a poor family and depend on each other. After meeting the female protagonist in their originally ordinary high school life, they recall the memories that should have been sealed by the younger sister. The three of them met in the laboratory in their previous life, and their young children were transformed into non-human "sons of god". What will the awakened hero do? Will the three people in this life be happy? What else is waiting for him ahead? This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.