Open the Door Part 1
A mysterious door appears in Tomobiki, intriguing the whole gang, who at first don't dare venture near it. Ataru, driven by his legendary curiosity and the hope of some kind of profit, eventually gives in to temptation despite his classmates' warnings. This first part lays the groundwork for a bigger mystery, leaving plenty of questions hanging about what's really hiding behind that door. Suspense builds gradually, promising a sequel full of twists.