Magical Sempai (手品先輩, Tejina-senpai) is a manga written and illustrated by Azu. It has been serialized in Weekly Young Magazine since February 29, 2016. Kodansha Comics has licensed it for digital release in English.
Our main character finds out that his school requires him to join a club and during his reluctant search he stumbles upon Tejina Senpai attempting magic tricks in her clubroom. Tejina Senpai has massive stage fright however and so now that she has an audience her attempts are simply comedic and usually result with her in sexual situations.
Official English site