I responded to someone above about it, but basically, you need to reach ~60x can cum first to get a "warning scene", after the scene x can cum will decrease, so you'll have to increase it again. I got the ending once I reached 70x can cum. Sometimes, you'll have to just stand in the room doing nothing for a couple of minutes for scenes to trigger, so be wary of that. Oh, and in order to increase the ammount of times that Anon can cum, you consume the Endurance drug, then you go to walk outside a bunch until Anon is very healthy again, then you consume another Endurance drug, and you just repeat this process until you get both scenes.