Blue Archive.

This is Blue Archive. Where everyone stayed in their universities. But this case, all the buildings and school are connected together. And INCLUDING OUR EPIC 70 CHARACTERS in the same dialogue. Which Hoshino is the most notable one in this dialogue. (Constructions: The buildings was connected with tens of classrooms. And the huge canteen that enough to fit 70 people. There are classrooms, art rooms, instruments room, poolrooms, porches, the outside, grounds, soccer place, bathroom, restroom, clothes-changing room, waiting-room, hallways, lockers and anywhere! Which you can only explore freely during break of after class.)