You’re strange. Earlier you asked for cheats, and now you’re asking for a gallery. Your statements are inconsistent, lol.
Animation gallery will be added in version 0.4, after HTA & LSHT are updated to version 1.0. So be Patient
Cheats = to unlock the gallery faster.
As simple as that for those just wanting casual gameplay with an H-game. If it is written and put on top of the main posts the creator writes, such as "When 1.0 is finished and released, then a gallery for people who want to just see the scenes." Something along those lines.
The names change, some characters are different. I respect that a lot of story and hard work is going into this game. But as many people have said before, a lot of this is confusing with the story, and it takes a lot to just get an H-scene.