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