wish we had gotten a naoko route, she's a cutie. the amount of dialogue with her makes me think that she had a route planned, but it ended up getting scrapped
how are you supposed to get the alternate ending for megan? i'm pretty sure i did everything right. i don't think any of the girls had an affection of more than 3, and i'm pretty sure i maxed out megan's affection points
For Megan, I've followed the walkthrough making sure I got all Megan points (not that straightforward, one of them needs Sophie points for rejecting her in the bathroom) until the walkthrough ended. From there, the choices were fairly obvious, I think just choose her as the best ass, and keep avoiding other girls.