Elya, 20, is a student and a future ecologist. One day, Matvey, the head of a construction company, came to her university to discuss the development plan for an old forest park. Elya did not hesitate to crush his project. Matvey is very interested in girls' confidence, And used his usual influence method - he just tried to ; purchase She, but Elya doesn't need a sponsor. Then, Matvey was surprised by her indestructibility and placed a bet on Elya: romantic seven days according to his rules. If the girl still decides to leave after that, he will refuse to build a skyscraper in the forest park. When Matvey really paused design work, she agreed. Elya thinks she's a bit like the movie 'Beautiful Woman' The female protagonist in, but it turns out that Matvey is not the person she imagined.
翻拍的电视动画《超次元游戏海王星：嗨》的完整两集☆ 《光明》分别于2020年10月28日和2020年11月25日发布。新的OVA1《海王星的动画：海王星的夏天》于2019年7月8日在PlayStation Video上发布，并于2020年12月25日发行。新OVA2《海王星：海王星周年纪念》于2021 12月15日在MiloQ+上发布，并于2022年10月26日发布。新的OVA3“海王星动画：太阳下的紫色茄子”于2023年4月发布。
