Here is the full list of all 104 Miss Neko achievements. It takes around 1-2 hours to unlock all of the achievements on Windows.
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Mei
Rinko
Hana
Saki
Youko
Hina
Momoko
Nana
Aoi
Sana
Miya
Mio
Miss Neko
Memories
Beat Yumi
Happy new year!
Yumi's first time
Play with Yumi
Yumi's level
Beat Meow
Bonus Level
Meow's first time
Play with Meow
Meow's level
Beat Mio
Mio‘s first time
Bravo!
Play with Mio
Mio's level
12 girls
Level 12
Beat Miya
Miya‘s first time
Master
Play with Miya
Miya's level
Level 11
Beat Sana
Sana's first time
Play with Sana
Sana's level
Level 10
Beat Aoi
Aoi's first time
Play with Aoi
Aoi's level
Level 9
One round one win
Beat Nana
Nana's first time
Play with Nana
Nana's level
Level 8
Beat Momoko
Momoko's first time
Play with Momoko
Momoko's level
Level 7
Beat Hina
Hina's first time
Play with Hina
Hina's level
Level 6
Beat Youko
Youko's first time
Play with Youko
Youko's level
Level 5
Beat Saki
Saki's first time
Play with Saki
Saki's level
Level 4
Beat Hana
Hana's first time
Play with Hana
Hana's level
Level 3
Beat Rinko
Rinko's first time
Play with Rinko
Rinko's level
Level 2
Level 1
Beat Mei
Mei's first time
Play with Mei
Mei's level
Hello meow
Complete hard mode in 5 minutes(or 7 minutes with DLC)
Complete hard mode in 7 minutes