Cycle

Ever fudged so badly in your relationship you wished you had a time machine/trinket to go back and fix your mistakes by actually doing and saying the right things to save what is almost lost?
This is something that Tiel doesn't need to worry about, as his grandmother left him a neat little pocketwatch, allowing him to save his relationship... if he plays his card correctly.
Through a thread of choices, your actions will determine which ending you will receive, and whether you will manage to save your relationship.
Still, regardless of the end post, Heron's criticisms only resonate ever so louder with every new cycle. Sure, you may be acknowledging eir hurt and needs, but are you truly doing this selflessly? Don't you invalidate eir choice, the one triggering the story, by going back in time until you succeed in your goal or relent in your defeat?
The game does not just do time loop incredibly successfully, it also raises quite the moral questions about slippery slopes when rewinding time...