In fact, it is a story about a girl who goes around in the name of sex.
Because the author likes age differences, the girl is two years younger than Tsuna.
Because the author likes to say 27, 69, 18... So the girl is a bit suicidal.
This article is not trivial, and the characters will not be too out of shape. The author cannot bear to distort the image of the characters because of his own selfish interests. Whether it is out of shape actually depends on the image of the characters in the readers' minds (show hands).
Whether it will be 1V1 is yet to be determined, so who the male protagonist will be is yet to be determined. There may be multiple endings...