Luhan would always use Taehyun as an excuse to hang out at Chanyeol's house. The reason he would always want to visit Taehyung is, Kim Aehri. 

Aehri is the maid of Chanyeol and his wife, Adel. He fell in love since their first meet during Chanyeol's wedding. For years, he was chasing after Aehri, but the girl ignored him completely.

She was near, but couldn’t be reach.

She was far, but he could see how bright her smile is.

She was captivating

Flawless

Bright and lively

She warmed his heart

But she’s playing hard to get.

It makes Luhan was so excited to play because he believe—it takes two to tango.

Aehri is the most challenging girl, because he never had girls rejected him—but Aehri did.