Koi no Shikata ga Wakaranai

Aimi Shuu is very popular and the rumors about him are also widely known. Everyone knows about how he would date anyone as long as they accept his condition to never get jealous, even when he's fooling around with others.

After another of his girlfriends breaks up with him, Aimi is asked out by Kaede Manato, an underclassman. Surprisingly, Kaede follows the condition very well, he never gets jealous and actually looks up to Aimi for living life in his own way, but...

(Source: Kadokawa, translated)