Hey I found this guide hope it helps :)
Common Route
Start a new game.
- Sit down with him
- Hide in the cathedral
- I’ll try that!
- I’ll never forget you.
Cordelian’s Route
Continue from / Load the save game
*Always choose Cordelian whenever possible.
- Light blue
- Can you stay longer?
Save Here for Katherine’s Route
- I wish you well.
- I’ll eat the sides.
- Break the silence.
- I need to talk to him.
- I’d find a hobby.
- Sit down beside him
- Kiss him