It sounds like you're looking for a working English translation patch for To Love Ru: True Princess (the PS Vita game).
The English patch for To Love-Ru Darkness: True Princess is a community-driven project designed to translate the PlayStation Vita visual novel into English. While a full, "official" fan-translation patch for True Princess is often confused with its predecessor, Battle Ecstasy
Brief overview of the fan-translation effort that produced an English patch for the visual novel/dating-sim "To Love-Ru: True Princess," the technical and legal challenges encountered, the fixes applied, and the role of preservation and fandom communities in maintaining access to niche Japanese media.
There is a very niche PC port of True Princess that was reverse-engineered from the Vita version. The "fixed" English patch works even easier on PC. You simply drop the patch.xp3 file into the game directory. However, the PC port lacks the touchscreen feature, making the "petting" minigames awkward to play with a mouse.
Note: The patch only works with the JP version (PCSG-006xx). It does not work with the Asian (Chinese) version.
Here is everything you need to know about the patch and how to get it running.
: Rito must increase specific stats like "Honesty" or "Care" to unlock events for different girls. For example, serious heroines like Yui or Mikan require high Honesty.