Here is the full list of all 13 Nurse Love Addiction achievements.
Saw Kaede's Bad Ending
Saw Sakuya's Bad Ending
Saw Nao's Bad Ending
Saw Itsuki's Bad Ending
Saw Itsuki's Good Ending
Saw Nao's Good Ending
Saw Kaede's Good Ending
Saw Sakuya's Good Ending
Cleared Chapter 3
Cleared Chapter 2
Cleared Chapter 1
Cleared Prologue
Saw the After School Ending