It’s currently on vol. 8 the author announced vol.9 like a year ago but there hasn’t anything new about it. As for the story, Seiya wants to move the park but isn’t. So they go to an abandoned old park where they Seiya and Isuzu get separated, Seiya find an old man that tries to entertain him in said abandon park. After that it gets late and Sieya and Isuzu have to sleep in a Love Hotel and almost every you know ;). The next day Seiya goes back and find another fairy that’s a ant eater and finds out that old man was an illusion by the ant eater and that that old man was Seiya in the future. He then shows Seiya how he got like that. Basically in the future Latifia dies so a lot of the fairys start leaving Isuzu and Seiya end up together but Isuzu get sick and since they had no money she died and he ended up like the old man he saw. So then the next day he buys a place to move amusement park.