>>2790698How about as a “literal genie” type scenario? She asks a spirit of learning or whatever at that shrine to make her the perfect student, and while it can genuinely help her process and retain knowledge better it decides that since there’s nothing it could do to get her to school in the event of a late train or whatever the best way to ensure perfect attendance is to keep her at school. “No one notices she’s missing” is just part of the entity altering others’ perception of her to justify everything she does as the actions of a model student. She gets used to being alone after school/weekends and takes to studying nude in the library while her laundry dries, and when she’s caught by a sports team there for a weekend practice she’s praised for her studiousness, nudity either ignored or praised as an innovative way to stay focused through the heat. And then she winds up leading a tutoring session nude.
Depending on where you wanted to go with it perhaps in her supernaturally enforced popularity she accidentally triggers some odd trends by her mistakes being seen as positive, studying naked being the perhaps too obvious example. Wearing a swimsuit instead of underwear as she's trying to figure out her laundry cycle perhaps, and of course no-one cares if their skirts stay in place anymore because swimsuits don’t count.