As a major update at the time, version 0.4 introduced several content additions and gameplay systems:
: The developer noted that a "bell sound" in choice menus indicates a correct selection toward favorable outcomes. XIX-v0.4-pc.zip
: Added the 8th friend event for Terra, 9th friend events for six main girls, and 5th friend events for three male characters. Mission Content : Included one new main mission. As a major update at the time, version 0
: Added a checklist for first friend events, a new guide system, and a gallery unlocker for specific character events. a new guide system