Koi no Shikata ga Wakaranai

Aimi may be popular, but the fact that he's trashy is known by everyone—even himself! He'll go out with anyone as long as he's not tied down to just one person. But now he's dating Kaede, a very convenient underclassman who doesn't ask for anything and doesn't say anything unnecessary. But isn't it strange that Kaede's attitude doesn't change even when he sees Aimi kissing a sex friend? Thrown off by this, Aimi starts to become possessive of Kaede. However, his feelings don't seem to be reaching Kaede at all... (Source: Yen Press) Note: Includes one extra chapter.