The Female Protagonists Were All Filled with Regret!

My name is Kitakami Yoru, I'm 17 years old, 176cm tall, and weigh 147kg. I attend Shuchiin Private High School. "Dead fat otaku" is my nickname. My favorite teacher is Aisami Riku, and my favorite director is Raiho Ken. I've always dreamed of being the protagonist in their works! On a spring outing... the school's aloof upperclassman, Kasumigaoka Utaha, has gone missing her underwear. I've been listed as the primary and only suspect... Main worldviews: Oregairu, Saekano, Gabriel DropOut, Kaguya-sama: Love Is War, Sakura-sou. Additional characters: Kirisu Mafuyu, Izumi Sagiri, Tokisaki Kurumi, The Quintessential Quintuplets, Sakurajima Mai, Kitagawa Umimu... and more to come, but I won't list them all.