I dont remember ….

I remember a webtoon with drawings recognizable by its bright colors, especially the two colors in the eyes which gave all the charm to the characters. it took place in a fateful world where there were different technologies that allow the protagonist to try to catch his target with whom he will fall in love. This target has white hair and is taller than him and runs away all the time. the brown-haired protagonist and a robot friend. thank you in advance, it frustrates me not to remember the webtoon….