Trinity Seven (2014)

Arata Kasuga's ordinary life takes a dramatic turn when a strange event called the "Collapse Phenomenon" unleashes chaos across the globe, leading to the loss of his cousin, Hijiri Kasuga, to another realm. Determined to find a solution to the phenomenon and to rescue Hijiri, Arata enrolls in the prestigious Royal Biblia Academy. There, he encounters seven enchanting female magic users known as the Trinity Seven, each with their own unique abilities and personalities, setting the stage for a blend of romance, comedy, and adventure in his magical education.