Biyaku Kyoushi

From Intercross:
I hate it, but my body doesn’t act the way I want.
Haibara is a chemistry teacher who hides his handsome face behind a pair of glasses and conducts research on suspicious medicine. What will happen to Mayuko, who accidentally drinks Haibara’s special aphrodisiac that can’t be cured without having sex? These two’s secret starts to unfold after school in the laboratory…
Includes 5 oneshots:
– Sensei no omocha
– Pretty Jewelery
– Kinren ~Yajuu no takara mono~
– Devil or Angel?
– Ura sensei no omocha (included with chapter 4)