Here is the full list of all 33 Giraffe and Annika achievements.
Unlocked all achievements
Received a Christmas gift
Got 'Great Fortune' result on my fortune
Took 50 or more photos
Hit every drum
Delivered something Giraffe forgot
Beat the game within 4.5 hours
Ate 50 foods
Collected all meowsterpieces
Collected every mysterious paper scrap
Cleared all rhythm games on hard mode
Cleared all rhythm games on all difficulties at A rank or higher
Cleared every hard rhythm game on S rank
Cleared every rhythm game with no misses
Obtained all bonus drawings from rhythm games
Cleared every rhythm game at normal or higher
Obtained 3 bonus drawings from rhythm games
Cleared dungeon 5
See every conversation with Mrs. Save
Stuck your face into every photo stand-in
Cleared dungeon 4
Collected 24 meowsterpieces
Changed into the swimsuit
Collected 18 meowsterpieces
Went into the bathroom 5 times
Cleared the Fire Dungeon
Collected 12 meowsterpieces
Saw the special idle animation
Cleared the Ocean Dungeon
Collected 6 meowsterpieces
Cleared the forest Dungeon
Obtained the bag
Obtained the key to Lisa's house