Ashita No 3600-byou明日の3600秒; 明日的3600秒; Ashita no 3600 Byou; Asu no 3600 Byou; les 3600 secondes du lendemain

From Chibi Manga: Natsuho visited an abandoned shrine during her high school trip; after the school trip, strange things kept happening to her - like going back in time. What's even more weird is lone wolf Kayano, staring and following her around.