S no Ryuugi

Mai Suzumiya's dated 12 guys in the past, and she's been dumped by all of them. The reason things don't work out for her romantically is because she's a sadist...... She wants a strong man! One day, her true nature is discovered by the plain, gloomy physics teacher, Mr. Shimizu. "You need to get laid, right?" Could it be that Mr. Shimizu isn't as glum as Mai thought......!?

from Renta!