Kotenshi Keiyaku × Koakuma Keiyaku

The protagonist gains mysterious powers for one day through a contract with a little angel and a little devil. If he contracts with the little angel, he must do "good things." If he contracts with the little devil, he must do "bad things." The power granted by the little angel is the ability to not be seen...the power to become invisible. The power granted by the little devil is the power to make anything disappear...the power to erase anything by touching it.