Personally I think you adding a different method that the player can do to get the third ending to be a pretty good choice, it’s at least pretty unique and outside what I, as the player, am used to expecting when playing a visual novel game. Though it’s a little bit obscure, it does add the interesting aspect of figuring out what it could mean (as you can tell from my previous message on what I thought it might had meant as I scoured through the game and net for answers LOL).