The flirty cafe owner... who is played by one of my favourite voice actors!

Getting the happy ending is fairly straightforward, if you've chosen a good response then a heart with the words UP will appear, signalling the character's affection has increased. In some cases both choices will grant the affection increase so it just depends on how you'd like your MC to respond, for this I've written both answers down. If only one option gives rep I will just add that to the guide.
For the normal ending you can pick either option if they both grant rep and I will only add the one option that doesn't give any rep at all (which is what we're looking for in the normal route)
Sorry if that doesn't make any sense, hopefully it will become apparent in the guide!

• Apologize (or) Fight back
  
• Continue forward
  
• Thank you (or) Why did he take my purse?
  
• You bought it for me? (or) You're too close...
  
• Deny it (or) Play along
  
• Accept
  
• Can I come by everyday? (or) What's our relationship?
  
• Can I really go with you?
  
• I'm important to you? (or) That's all you want?
  
• Push the man aside
  
• Don't say that...
  
• Peek through a closer window
  
• Think positive
  
• You're letting me go?
  
• Do you like quieter girls? (or) Do you hate reckless girls?
  
• Ask the guards for help (or) Attack the guards
  
• Save my brother

• Fight back (or) Apologize
  
• Stay where I am
  
• Why did he take my purse? (or) Thank you
  
• You're too close... (or) You bought it for me?
  
• Play along (or) Deny it
  
• Refuse
  
• What's our relationship? (or) Can I come by everyday?
  
• When does the festival start?
  
• That's all you want? (or) I'm important to you?
  
• Go home
  
• ...
  
• Go home
  
• Hang my head
  
• Soshi agreed to negotiate?
  
• Do you hate reckless girls? (or) Do you like quieter girls?
  
• Attack the guards (or) Ask the guards for help
  
• I'm staying with my brother

The above guides got me his Happy and Normal ending achievements :3

The captive former Prince...

Same rules apply as the guide above, sometimes both answers give rep and sometimes it's just the one.

• Prisoner? (or) Why do you hate my brother?
  
• I never said I couldn't do it (or) I'll do my best
  
• Tell the truth
  
• How do you know I will? (or) Why can't you go too?
  
• That's not true (or) I can't deny it
  
• Deny it
  
• Stay a little longer (or) I'm not a baby
  
• Yeah (or) That's not it
  
• Romance novels (or) History books
  
• Apologize (or) Fight back
  
• Relax
  
• I'm not sure about this (or) I don't want to dance
  
• Okay

• Prisoner? (or) Why do you hate my brother?
  
• I never said I couldn't do it (or) I'll do my best
  
• Hide the truth
  
• How do you know I will? (or) Why can't you go too?
  
• That's not true (or) I can't deny it
  
• Remain silent
  
• Stay a little longer (or) I'm not a baby
  
• Yeah (or) That's not it
  
• Romance novels (or) History books
  
• Apologize (or) Fight back
  
• Don't relax
  
• I'm not sure about this (or) I don't want to dance
  
• I can't.

Normal and Happy ending achievements gained through these answers.

The reticent bodyguard...

• I'm not worthy (or) No, but...
  
• Try again (or) Give up
  
• Leave
  
• I want to see all of the shops (or) I just want to walk around
  
• Are the houses ok? (or) We can't go back?
  
• State what I think (or) Stay quiet
  
• Leave the room
  
• Do women train here too? (or) Did you used to train here?
  
• Ask Sera (or) Take a walk in the palace
  
• Keep holding hands
  
• Say no
  
• Um... (or) Can you leave?
  
• I'll think about it
  
• Talk (or) Sleep
  
• When did this start? (or) Why are you doing this?
  
• Tell the truth
  
• Don't stop him (or) Stop him
  
• Sacrifices are ridiculous

• I'm not worthy (or) No, but...
  
• Try again (or) Give up
  
• Listen
  
• I want to see all of the shops (or) I just want to walk around
  
• Are the houses ok? (or) We can't go back?
  
• State what I think (or) Stay quiet
  
• Stay in the room
  
• Do women train here too? (or) Did you used to train here?
  
• Ask Sera (or) Take a walk in the palace
  
• Let go of his hand
  
• Say yes
  
• Um... (or) Can you leave?
  
• Forget it...
  
• Talk (or) Sleep
  
• When did this start? (or) Why are you doing this?
  
• Stay quiet
  
• Don't stop him (or) Stop him
  
• I'm not convinced

The mild-mannered aide...

• The future
  
• A cookie (or) A sugar candy
  
• This is all new to me (or) I’m sorry…
  
• It wasn’t made in this country (or) I’ve never seen this design before
  
• I was spacing out
  
• That’s not true (or) I’m happy
  
• I want to do something (or) You seem so tired
  
• Left (or) Forward
  
• That’s embarrassing (or) Who’s watching?
  
• Ask what’s wrong (or) Hold his hand
  
• No (or) Maybe
  
• I trusted you (or) Why a revolution?
  
• Are you serious? (or) Forget the revolution
  
• Ask about the promise
  
• (MAKE SAVE)
  
• You do deserve it

• (LOAD SAVE)
  
• Please take his hand

• The past
  
• A cookie (or) A sugar candy
  
• This is all new to me (or) I’m sorry…
  
• It wasn’t made in this country (or) I’ve never seen this design before
  
• I'm tired
  
• That’s not true (or) I’m happy
  
• I want to do something (or) You seem so tired
  
• Left (or) Forward
  
• That’s embarrassing (or) Who’s watching?
  
• Ask what’s wrong (or) Hold his hand
  
• No (or) Maybe
  
• I trusted you (or) Why a revolution?
  
• Are you serious? (or) Forget the revolution
  
• Just watch
  
• Please take his hand

The aloof lord...

• Just pick one
  
• Yes
  
• Go for a walk in the palace
  
• I do recognise you
  
• I think he’s kind
  
• Tell someone
  
• It’s not going well
  
• Go to Soshi’s room
  
• Go with Soshi’s choice
  
• Turn the corner
  
• No, it’s not
  
• I wanted to go with you

• Ask for chopsticks
  
• No
  
• Stay in your room
  
• I don’t
  
• I think he’s scary
  
• Hide it
  
• It’s no problem
  
• Go to Kagemitsu’s room
  
• Go with the tailor’s choice
  
• Go straight
  
• I just can’t
  
• I want to talk to you