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High school student Taro Sado comes to realize that he is an extreme masochist and attempts to conceal this from his crush. To fix his problem, he enrolls in his school's "2nd Volunteer Club", where Mio Isurugi and the other members attempt to cure him through various "training" regimens.

All Hell Breaks Loose! Basara Toujou is hesitant about his father's sudden decision to remarry, and yet can't deny it comes with a couple perks--two adorable little sisters.