: 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
It sounds like you're referring to Gakuen de Jikan yo Tomare (often localized as Stop Time in School or similar), which is a visual novel/dating sim series, and the word "portable" suggests the PSP version. gakuen de jikan yo tomare portable
The game's artwork and sound design are also noteworthy. The character designs, while not overly complex, are endearing and expressive. The soundtrack, composed by Ryukishi07 and others, features a haunting and atmospheric score that perfectly complements the game's mood. : Like most visual novels, your dialogue choices