Okay so Age isnt a factor...Collision isnt a factor (Katsura was right in front after all)...and limit of people hit by the birthmark at the time isnt also a factor...So what IS Katsura sensei? Who exactly is she? I know married/women with boyfriends definitely still fall under the spell of the birthmark. And lesbians also work cause we have Takako as an example. but shes somehow the exception.
Does Katsura have strong hate against men? is it because shes divorced or something? or is she Trans? veeery interesting.
also lovely to note that this manga isnt a stranger to the passage of time when someones in their thoughts. the time it took Rin to imagine what would happen if the "guests" come in and he pulls his pants up actually passed in time and as soon as he got out of his thoughts the guests are already inside.