Woojin and Sage were step brothers.. Their parents met each other at work and ended up dating and getting married, they introduced both of their kids to each other and they insisted on them sharing a room.

Woojin was a bit skeptical about this because.. Sage and him weren't that close but as soon as he saw Sage, it felt like he fell in love at first sight.

And there.. they were now sharing a bed.. Sage was still in the bathroom and emerges wearing his usual small tight shorts and loose shirt.