Reached the "PLACEHOLDER END", the boss keeps respawning after that message and it looks like that's the farthest I can get in the game.
Promising so far and I like the intro and combat as usual. However on my 5th train car, the gameplay loop gets a bit tiring and samey. The items aren't really that impactful in combat. Some class changes are outright broken and makes the combat easy. For example, the Fairy TF that gives you arts that heals you and if you equip the right passive arts it just outrights make you unkillable while others downgrades your character like the Cat TF.
Also found some bugs where the conversation that pops up on screen repeats endlessly until you defeat a boss. There is also a bug where the in-battle dialogue when you hit a certain point of willpower damage repeats whenever you reach a new train car from the start of the TF until the latest TF progress you got. For example, one of my party member is already at a point where they are about to get an idol outfit. I got to the next train car and it repeats the dialogue until that point. Also, saving doesn't work so I had to reach the "end" in one sitting.
Will watch for updates on this one because I am hooked already and see how the story will progress in the future. I'm curious about how you will handle the "bad ends" since it is based on how you progress through the train cars.