I don't think a birthday party would be possible after murderhobo FL. Her first life arc was basically, Ojousama -> Murderhobo -> sane in the desolated aftermath.
By the way, if that was the actual line from Negima in your PFP, I'm questioning my life choices. I mean, questioning them to a greater extent than "elementary school-aged teacher builds harem out of entire girl's middle school classroo" makes me question my life choices.