Teach for the first time.
Take a part-time job for the first time.
Work out for the first time.
Add any decoration to your room.
Give any girl a gift she likes the most.
Reach the Official Teacher position.
Reach the Mid Senior Teacher position.
Reach the Senior Teacher position.
Reach the Head Teacher position.
Reach the Department Vice Head position.
Reach the Department Head position.
Reach the maximum upgrade by working out.
Reach one heart of affection from any girl.
Pray at the tree once.
Pet any cat.
Give any girl an outfit she likes the most.
Read books on the shelf once.
Reach the secret ending of the four main girls.