Adult PC Game: Linker Bell Academia - Rakudai Majo to Himitsu no Gishiki by Casket Archive

Misaki Hiro is normal student without any special trait or talent. One day, he is suddenly sent to a different world filled with magic by a mysterious goddess. His first meeting in the new world is with Eros Strobel who is student of all-girls magic school. Since his appearance overlaps with her summoning magic, she treats him as her familiar and has him stay at the school. There he meets up with her friends: the lazy senior human-beast Hibiki Flamel and stoic but kind Melusine Dragonette from the Dragon tribe.

Later, at the same time when he knows about the trio is actually useless students who can't use magic, the girls also realize his special ability that they can use magic when holding hand with him. They welcome him to their "Soundless Club" as savior with expectation that things will change from now on.