Gravitation Novel...
Ah yes... well, here's what we could find on the Gravitation Novel... which is basically not the graphic novel, but you know... a novel which is written in words... But I think there are some pages of the manga in there... not entirely sure...
Bad Luck's vocalist, Shuichi Shindou, spent his whole life thinking there is no such thing as a "fated love". To be charmed by gravity, it is said, is the origin of love. By making Eiri Yuki's heart his, he gained a beloved boyfriend, on whom he persists on intruding upon, until Eiri has him move in. Hiro, Shuichi's best friend and bandmate, has a theory about Eiri's interference in hindering the concert, what with problems of laziness of Shuichi's surroundings ... Media mix expansion to be an anxious topic of this high tension love comedy, lost in the novelists debut.