Thanks! I am glad your enjoying it.
For Iliff's devotion, you can only get this if you fully failed the coin toss game on the train. NSFW mode has to be on for this. If you did this and have 2 devotion points, you'll get a menu choice and you have to say that hes jealous of Yukine.
In Chapter 1, you have to take the train as one of the choose your fates. If you take the teleporter, it will lock the tunnel option.