Sex=Love² - Shinjou, Mayu

All Kumiko wants is to become a teacher; however, her father is dead set against it. He is giving her one chance to prove herself as a teacher before forbidding her from pursuing this career for ever. Meet her newest student, Ryu-kun. This student has no desire to learn anything from his tutors, rather he is an expert at teaching them about...sex?!

(Source: ShoujoMagic)

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