The protagonist’s journey through a "pivotal summer" that changes his perspective on family and maturity.
The narrative follows , a young football prodigy who has lived with his older sister, Reiko, since the tragic loss of their parents. The story begins during a hot summer when Ryuuki and his friends encounter the work of a popular adult film actress named Kiriru .
In fact, one review notes:
So, putting it all together, could be referring to a highly-regarded first volume of a work (possibly a manga, anime, or novel) titled "The Summer of the Boy's Coming of Age," noted on or related to September 6, 2024.
