Immortal King, You Want Me to Deliver Takeout?

Immortal King Qin Xuan was betrayed in the immortal world and reborn on Earth, losing his cultivation. As soon as he landed, he was knocked over by Xia Youyou, the heroine who was in the late stage of chuunibyou. The male protagonist pretends to have amnesia and temporarily lives in the female protagonist's house, where he begins to get in touch with modern society. The Immortal King's magic is extremely slow to recover. In order to pay rent and eat, the male protagonist has no choice but to register as a delivery boy...