Achievements

Achievements can give rewards if reached a certain number.

Rewards
Rewards can involve in chocolates or the output being multiplied.

Tasks and their rewards(Chapter 1)
Lovely Girl(reaching a certain Guitar Girl Level) - Likes*2

Power of Cheer(upgrading the follower level) - All likes*2

I like it(getting a certain amount of likes)-Likes getting multiplied

Fan Club(Getting a certain amount of fans)-Chocolates

Performance(Getting a certain total level of Musical Pieces)-Chocolates

Together(Reaching a certain amount of taps)-Chocolates

I really like it!(reaching a certain amount of tapping Big Hearts)-Chocolates

Technical Girl(Using skills for a certain amount of times)-Chocolates

Attendance(Login to the game a certain amount of days)-Chocolates

Watching Advertisement(Watching a certain amount of advertisements)-Chocolates

Tasks and their rewards(Chapter 2)
Busking Guitar Girl(Reaching a certain level for busking -All output increased x 3

Supporters(Reach a certain level for total levels of Followers(Busking) - All output increased x 5

I Love You All!(Reaching a certain amount of Hearts) - All output increased x 5

Live Viewers!(Reaching a certain amount of Live Viewers) - 100 Chocolate

Our Melody(Reach a certain amount of tapping) - 100 Chocolate

Are You Ready? - 50 Chocolate

Break Time - 100 Chocolate