Since knowing the other party has the Mystic Eyes of Death Perception, Fang Zheng naturally wouldn't let Akiha go out anymore. He let Akiha take care of Arcueid while he went out alone.
After all, no matter how formidable the Mystic Eyes of Death Perception are, they're still a product of another world; they couldn't possibly see the lines of death on Fang Zheng's body. If they try, even better, the Power of Time would directly burn their brain, making it easy for Fang Zheng.
Unfortunately, Akiha is someone from this world and doesn't have the ability to resist the Mystic Eyes of Death Perception. Fang Zheng brought her along as a convenient summer extracurricular tutor, but definitely not to send her to her death.
So, it's better for Fang Zheng to handle things himself at this moment.
But finding that guy isn't that easy.
