Zoku Gosenzo San`e - Season 1

Having returned from his time in America, So Gen is welcomed back by the girls who greatly missed his presence. However, despite receiving treatment abroad, his medical condition shows no sign of improvement. The situation grows more dire as a series of disturbing events unfolds at the school, where individuals are found fainted from significant blood loss and rumors of vampires circulate. Gen and a companion must now investigate these strange occurrences to uncover the truth.