I Transformed into a Witch and Posted Stickers with the School Belle

Zhuang Xiao traveled to another world. From the time he was a fetus to college, his life was as ordinary as stagnant water, without any disturbance. There is no so-called system, and there is no so-called luck. On the contrary, his body is weak, as if he will collapse when the wind blows. But in his sophomore year, he fainted and was sent to the hospital, where he was found to have a serious heart disease. His life will end in good years. A confused little elf appeared in front of him accidentally. The two made a deal. He needed to help the elf replenish his energy, and the elf helped him treat his heart disease. From then on, the two started a new life.