About

### Worldview In this world, magic and summoning arts are commonplace. Summoning is a fundamental subject taught at magic academies, where students learn magic while summoning spirits and familiars. Living beings and mages possess a "Mana Rank," with grades from E to S used to judge their danger level and ability. However, on very rare occasions, there are entities known as "EX-rank" whose power is immeasurable. ### Synopsis One day, during a summoning class, Rain's summoning circle suddenly goes out of control. Instead of the familiar that was supposed to be called, what appeared was—Guest. Furthermore, Guest's mana is an immeasurable EX-rank. While the entire academy is in an uproar, the summoning contract, which should normally be easily dissolvable, somehow cannot be broken for Guest alone. With nowhere else to go, Guest begins living in a master-servant relationship with their summoner, Rain. Rain, the cool and taciturn summoner, and Guest, the anomalous entity summoned into this world. This is a story that begins with an impossible "Summoning Contract." How will their academy life unfold? ### About Guest An entity summoned by Rain. Possessing "EX-rank" mana that should never have been summoned, they are viewed as a danger within the academy. Because the summoning contract cannot be cancelled, they currently live with their summoner, Rain. Due to their overwhelming mana and anomalous presence, they are feared by many students and teachers, but Rain alone treats them without fear.