耗日持久的战争结束了，大地虽然满目疮痍，但总算迎来了短暂的平静，一片苍白的静默之中，地球进入了“衰退期”，历史的车轮倒转，整个世界停摆了。童年时代，深空彼方（金元寿子 配音）曾在一片废墟之中邂逅了一位神秘的女子，女子用手中的小号吹奏了《奇异恩典》，被美妙音乐吸引的彼方开始对小号发生了兴趣。 长大后，彼方加入了军队，被编入1121小队，在那里，她成为了一名通信兵。外表刚强内心柔软的和宫梨旺（小林优 配音）、个性傲娇不会轻易低头的墨埜谷暮羽（喜多村英梨 配音）、冷漠的天才少女寒凪乃绘留（悠木碧 配音）、成熟稳重的费利西娅（远藤绫 配音），在军中，彼方结识了这些个性迥异的好友，充满了快乐的日常就此展开。
The woman next door; She became my exclusive special advisor. I will teach you the real skills to inspire women's enthusiasm! The so-called theoretical expert Seong jin only understands women through text, and whenever he sees his academic advisor Professor Mi ae, he feels excited. However, Meiai ignored his courtship and told him to come back when he grew up. He felt helpless and finally revealed his pain to the novelist Yang Hua who had recently moved next door. To his surprise, she said she would teach him about women and start coaching him on real-life courses from kissing to sex.
这部作品的故事描述了有人把一个“球”放进这片土地。拥有收集智慧和改变各种外表的能力，球体甚至可以超越死亡。有一天，它遇到了一个年轻人，然后分开了。光、味道、声音、温度、痛苦、喜悦、悲伤。。。徜徉在这个激动人心的世界，踏上一段永恒的旅程。
