[Sailor Enlil]

Originally Posted by relentlessflame

Ah, well, I haven't unlocked it myself, but I did (cheat and) consult the code files and can tell you what it is...

Spoiler:

It's actually an alternate wake-up scene on March 9th where instead of beating Nemu's countdown, you end up sleeping through it. Eventually you do get up and she reminds you of your date with her later that day. So, it's on Nemu's path, but I'm not sure what provokes it. Possibly related to your alarm settings earlier?

Hmm, maybe you're right. After all the walkthrough states that

Spoiler:

you're supposed to set the alarm to "early" almost every evening before going to bed

to get to Nemu's path. I'll try different settings.