In this air of humanity, one class of humans stands out from the others. The Monos. They are totally normal people, but they don't see colors. Their only chance of one day seeing them is to meet their 'Probe', this person who can give them the chance to admire the world...

Beon-In was playing with the glasses on his eyes, dangling them between his fingers on the tip of his nose. He looked up towards the ceiling of his classroom and tilted his head to the side when he saw the new student who had just filled the empty desk in front of his. He had probably arrived while Beon-In was sleeping... He then stood up and walked in front of this new boy, whom he stared at through his black glasses.

"Hey, you're the new dude in class?"