第1章 故事的开局极其温柔 

The story begins very gently

The president is Yukino Yukinoshita,
  his neighbor is Mahiru Shiina,
  his classmate is Yuigahama Yui,
  the student council president is Kaguya Shinomiya, and
  the transfer students are quintuplets...
  Natsuo has arrived in a two-dimensional world, but something seems amiss.
  At night, he experiences strange dreams where he defeats monsters and unlocks abilities—strength, charisma, drawing, writing, music...
  During the day, people mutate, becoming monsters and endangering them. He must protect the world.
  This is an ordinary world, but this world is anything but ordinary.

部长是雪之下雪乃，
  邻居是椎名真昼，
  同班同学是由比滨结衣，
  学生会长是四宫辉夜，
  转学生是五胞胎......
  夏生来到了二次元的世界，但这个世界好像有点不对劲。
  晚上，他会进入奇怪的梦境，打怪爆能力——力量、魅力、画画、写作、音乐......
  白天，有人变异，如同魔物，危害人，他要保护世界。
  这是个日常的世界，但这个世界，不日常。