I am reading an old visual novel called Midsummer Haze as part of my review project. Now it has one choice which branches into two endings. There's a third ending visible. I guessed the gimmick, but before I bashed my head into a wall, I peaked at a single reference to the gimmick on VNDB... I will have to bash my head into a wall. But the fact I'm even able to run this took great effort... must persevere...
https://thenewleafjournal.com/leaf/on-the-hunt-for-manatsu-no-kagerou/