When the RP first opened up, Dongwoo ( currently Jinyoung ) wished for Ailee, and what  did Jin ( currently Yongguk ) do?

He ruined the womenly image of her.

And that image buried deep into his mind.

Later the next day, Dongwoo/Jinyoung wished for Miss A's Fei and guess what happened?

Jin/Yongguk ruined it again.

Now going back to those memories, it is clear....

Dongwoo/Jinyo