>>72837108Mumei exudes feminine bratty pheromones.
She's frustrating in that "is she doing this on purpose in order to make me mad, or is she actually retarded?" way that incites desire for correction but also protection. You want to hold her and your arms and hatefuck/reassure her it'll all be okay. Maybe both at once, or alternating.
And because she's ALWAYS like this it means she's ALWAYS sexy. When a girl is overtly sexual sometimes, but otherwise not, you become accustomed to it and calm down when she does. But a girl who's NEVER overtly sexual just makes you horny ALL THE TIME, and then if she ever does anything, even accidentily, that seems slightly sexy it becomes unberable.
In other words, Mumei is the EN Sora, who while overtly being the least sexy girl is covertly the hottest.