Class 103, a Gathering of Talents

In some ways, Class 103 is a gathering place for extraordinary people. It has a heroine (the younger sister) who is incredibly strong and can eat a lot, and an unremarkable-looking hero (the older brother); a rich villain (?); a witch class president; a cross-dressing male classmate; a TS transformation magical girl; a psychic girl; a creator god; and all sorts of other classmates. This is the story of what happens between them. P.S. (Homeroom teacher: Good grief, this is terrifying!)