In his previous life, he abandoned his family for a man, and was eventually abandoned by the man. The child he gave birth to after a narrow escape was also treated as a monster and died at the hands of the man. The dagger inserted into the baby's chest was instantly inserted into his own chest.
After his rebirth, he was afraid. Facing his brother who looked similar to a man, he lived in hiding, but he didn't know that someone had already regarded him as a treasure, carefully hiding, protecting, and keeping him warm.