Ouji-sama wa Marriage Blue

A prince-like high school boy and an ugly female teacher, in a contract marriage!? Good looks and good manners. I'm known by those around me as a prince, but for some reason I've ended up in a contract marriage. And what's more, my partner is Iwasaki Kinuko, a perverted virgin teacher who's extremely ugly in both face and personality!!! Ahhh, there really is no way a woman would force herself on me like this, sexually harassing me. Hmm... but when I kiss her, she makes this face...Why am I accidentally falling for this old woman!?!? No way, no way!! This is impossible! (Source: Shogakukan, translated) Note: Includes one extra chapter.