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30-sai no Hoken Taiiku is a Japanese adult guidebook series by Mitsuba, published from November 2008 to June 2011 with a manga adaptation published in Comic Rex since November 2010 and an anime adaptation aired from April to June 2011. The series is about the relationship between two 30-year-old bachelors, one of whom has been forced to graduate from virginity by a guardian angel.
First Masturbation (S01E11)
Natsu's boyfriend leaves her, so she gains weight from potato chips out of depression.