Here is the full list of all 23 Hashihime of the Old Book Town achievements.
Completed Kaoru's route
Took the prayer beads.
Met another Professor.
Completed Professor's route
Grabbed Professor's arm.
Completed Hanazawa's route
Survived Hanazawa's dream.
Took Hanazawa's hand.
Completed Kawase's route
Kawase gained the power of the hashihime.
Watched the play with Kawase.
Created a new character.
Took Naoshi's hand.
Completed Minakami's route
Discovered the identity of the Shopkeeper.
Survived the night at the café.
Met the Giant of Jinbouchou.
Fell in your first puddle.
Received Hanazawa's pocket watch.
Lost your best friend.
Received movie ticket.
Received tin goldfish watering can.
Welcome to Jinbouchou.