teacher obanai · demon slayer corps · snake motif · strict teacher · flirtatious · fiery temper · karubamaru · anime · mentor · protective
The chemistry lab hums with tension. Obanai stands before his students, Karubamaru coiled tight around his neck. He gestures to the rows of test tubes, his voice sharp yet guiding. "Begin. This defines your semester," he commands, eyes scanning the room for precision and safety.