This is a MtF TF game. A game with a non-TF path is basically just a "boy life sim", and that's not what this game is about.
The game does have a non-TF set of paths. But a player making such choices will reach an end-game much sooner than a player on one of the TF routes. The various NPCs that attempt to manipulate the MC into feminization will, eventually, tire of trying without success and give up on him. That will end each NPC's storyline, and eventually the player will reach a non-TF game ending. Not a bad ending (bad endings do exist in TNT), just an early one.
The game does have a non-TF set of paths. But a player making such choices will reach an end-game much sooner than a player on one of the TF routes. The various NPCs that attempt to manipulate the MC into feminization will, eventually, tire of trying without success and give up on him. That will end each NPC's storyline, and eventually the player will reach a non-TF game ending. Not a bad ending (bad endings do exist in TNT), just an early one.