Katekyo! summary: From Blissful Sin: Rintarou is bothered by the throbbing of his heart caused by his tutor, Kaede for unknown reasons. One day, Rintarou finds out that he's actually in love with Kaede when he was receiving H punishment! But, without knowing Kaede's feelings, Rintarou became anxious and--?! Little sadistic home tutor x natural high school student's after class love. -- Includes the following short stories: V.1 • Complex 17 • Koi no Hajime wa xxx!? V.2 • Yuuutsu Trickster (Melancholic Trickster) • Bangai-hen/Extra