Linker Bell Academia ~Ryuuzoku no Fiancée~

When Misaki Hiro steps into a convenience store to buy a late-night snack, he finds himself transported to another world. "You have been chosen—as the hero who will save this world." Summoned as the familiar of Eros Strobel, Hiro enrolls at Animato Girls' Academy, a school specializing in magic. --Eros Strobel, a witch from a prestigious family who can't use magic. --Melly, a laid-back, easygoing dragon mage with no sense of urgency. --Hibiki Flamel, a kemonomimi alchemist who's always holed up in her lab. Surrounded by girls, Hiro's new life is filled with lucky perverted moments and unavoidable awkward situations. In the world of bells and magic, Partition, Hiro's new adventure begins. <The Dragon's Fiancé> As Hiro prepares for the next adventure exam, he teams up with Melly as his partner. Melly is emotionally reserved, making it hard to tell what she's thinking. On top of that, she has zero wariness around the opposite sex. Hiro's days are filled with flustered reactions to her bold behavior. One night, after finishing their training, Hiro stumbles upon Melly bathing in a spring behind the academy. Her naked body glows under the moonlight. Noticing Hiro, Melly remains expressionless as she says: "—I've found my future spouse." [Translated from DLsite]