Here is the full list of all 26 Waifu Master achievements.
Earn 10 000
Earn 100 000
Earn 500 000
Earn 10 000 reputation points
Earn 100 000 reputation points
Earn 500 000 reputation points
Sell cookies 10 times
Find coins in a fountain
Work as a waitress
Work as a pizza delivery girl
Go to the gym
Go to the cafe 2 times
Buy coffee 10 times
Buy a suit
Get an office job
Go to the club 2 times
Have a drink at the bar 5 times
Get a pass to the spa
Go to the clinic 5 times
Buy an executive car
Go abroad to receive treatment
Lead the company
Buy a spa
Hire a personal chef
Get a travel visa
Buy a villa