Bite Into Me

During his freshman year of high school, a former teacher who had become a recluse is visited by one of her former students. Despite being a once-beautiful and caring woman who had helped him through his academic struggles, she had abandoned her teaching career and secluded herself from society. However, during his visit, the student accidentally witnesses her drinking blood and exhibiting a strong aversion to light, prompting him to consider the possibility that she may be a vampire.