Official English Translation: https://futekiya.com/ghost-of-after-school/

As a punishment for losing a game, Shinji is forced to take pictures in the science room after school, and as someone who hates ghosts, he’s terrified. After timidly going into the science room, he finds a so-called ghost named Sagara. Sagara takes a liking to him and tells him to come back because if he doesn’t, he’ll be cursed. Going to the science room after school becomes an everyday thing until one day, Sagara says that he’s disappearing and kisses Shinji in this after-school high school ghost romance by Nayuta Nago☆