Out of all the endings, I felt that the 5th ending is the best. True, you & Moeka never got to do your karaoke together that night, but you got to do it the next night + most importantly, the coach was properly arrested. In the 2nd ending, you succeeded leaving with Moeka, but it wasn't a solid good ending (that camera was still in the girls' locker room, which means the coach will continue with his perverse hobbies). What a good game and I appreciate that the dev was conscientious enough to show all those hints to the player, so you can explore all 6 endings.
