The people he loved in his previous life fell one by one in front of him, and all he was left with were the cold corpses without a trace of warmth.
Inexplicably, he returned to the summer when he was 16 years old. He vowed to change the fate of those in his previous life, to be a low-key academic master, to be the mysterious head of Qing Tangyu, and to be involved in the mercenary world...
In this life, he wants to protect his world and his happiness, and carefully move towards that person
