Core Themes
As a visual novel, the core gameplay typically involves reading through narrative sequences and making choices that can lead to different outcomes.
You're referring to the Japanese phrase "" (Gakuen de Jikan yo Tomare) which translates to "Time to Stop at School" or more colloquially, "School Rumble" when including the "(Pōtāburu)" which implies a portable or handheld version.
: Like most visual novels, your dialogue choices influence the ending. To reach a "True Ending" for a specific character, consistent positive (or specific thematic) responses are required. Finding Detailed Resources