safebooru https://safebooru.org/index.php?page=atom&tags=2girls calculus cape chalk chalkboard closed eyes homological algebra kitashirakawa chiyuri maku (artist) math multiple girls okazaki yumemi science sweatdrop touhou touhou (pc-98) ⑨2024-06-01T05:39:06Zsafebooru

  • Nobody here but us chickens!