在蝴蝶屋完成学业后，Tanjiro和其他人到达了下一个任务地点，“无限列车”。在短时间内有四十多人在那里失踪。炭次郎与携带游豆子的善一和伊助一起，遇到了鬼灭队中最强的剑士之一的严州炼狱星手郎。
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.
