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