Here are the three pillars of the v03 update:

As the volume concludes, Haru is no longer the victim of his circumstances but an active player in a dangerous game. The "Secret Life" is no longer a choice—it’s a survival strategy. Readers should prepare for a cliffhanger that sets the stage for an even more explosive Volume 04.

The "Harus Secret Life V03" series, with its inclusion of crime-related narratives, represents an evolution in the story, potentially broadening its appeal and deepening the engagement of its audience. As with any media, the success of this direction depends on execution and reception. Detailed analysis and reviews from readers and critics will provide a clearer picture of how well these new elements are integrated into the series.

If none of those match, you might want to double-check the title for variations like: Haru no [Something] (Japanese title) The Secret Life of Haru Haru: Secret Life