HAPPY Twogether

Four years ago, the idol group Dream Boy disbanded after being embroiled in some kind of scandal. And now... Jae-Young, formerly known as "Happy" in Dream Boy, was struggling financially and working a part-time delivery job when he heard that the group's leader, Su-Kyum, had passed out drunk at a club, and he rushed to him. Although they share the same stage name, Seung-Min, aka "Happy" and the most popular rapper and producer these days, saves Jae-Young from collapsing from photosensitivity syndrome and suggests they work together...
"You know who I am, right? Let's work together."
(Source: Ridibooks, translated)