Jeongin is a high school librarian and is also a sophomore in high school. Jeongin is mute and can't speak which causes him to get bullied. So he spends all his time in the library to avoid bullies. Bullies always come up to him and tease him but he tries to act like he doesn't care but deep down his heart is broken and he hates himself for being mute.

He was arranging the books in the library and while he was carrying some books the bully pushed him causing Jeongin to fall to the ground and the books fell and the bullies continued to make fun of him and when the bullies left Jeongin stood up and was picking up the books that were thrown on the ground and tears were streaming down his eyes and filling his glasses.